Add navigation README for Flamego migration docs

Co-authored-by: unknwon <2946214+unknwon@users.noreply.github.com>

docs/dev/README_FLAMEGO_MIGRATION.md

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+# Flamego Migration Documentation
+
+This directory contains comprehensive documentation for migrating Gogs from Macaron to Flamego.
+
+## Quick Navigation
+
+### 📋 Start Here
+- **[FLAMEGO_MIGRATION_SUMMARY.md](./FLAMEGO_MIGRATION_SUMMARY.md)** - Read this first! Answers the core question and provides executive summary
+
+### 📚 Detailed Guides
+- **[macaron_to_flamego_migration.md](./macaron_to_flamego_migration.md)** - Complete migration guide with strategy, timeline, and solutions
+- **[flamego_migration_examples.md](./flamego_migration_examples.md)** - Side-by-side code examples showing before/after patterns
+- **[flamego_migration_checklist.md](./flamego_migration_checklist.md)** - Step-by-step execution checklist with daily tasks
+- **[flamego_quick_reference.md](./flamego_quick_reference.md)** - Quick lookup tables for common patterns and APIs
+
+## Document Purposes
+
+| Document | Purpose | Best For |
+|----------|---------|----------|
+| **SUMMARY** | Decision making | Management, stakeholders |
+| **Migration Guide** | Understanding approach | Tech leads, architects |
+| **Code Examples** | Implementation reference | Developers during coding |
+| **Checklist** | Execution tracking | Project managers, developers |
+| **Quick Reference** | Quick lookups | All developers during migration |
+
+## Reading Order
+
+### For Decision Makers
+1. Read: FLAMEGO_MIGRATION_SUMMARY.md
+2. Scan: macaron_to_flamego_migration.md (focus on risks/benefits)
+3. Review: flamego_migration_checklist.md (focus on timeline)
+
+### For Project Managers
+1. Read: FLAMEGO_MIGRATION_SUMMARY.md
+2. Read: flamego_migration_checklist.md (execution plan)
+3. Reference: macaron_to_flamego_migration.md (technical details)
+
+### For Developers
+1. Read: FLAMEGO_MIGRATION_SUMMARY.md (overview)
+2. Study: flamego_migration_examples.md (learn patterns)
+3. Reference: flamego_quick_reference.md (during coding)
+4. Follow: flamego_migration_checklist.md (track progress)
+
+### For Reviewers
+1. Read: FLAMEGO_MIGRATION_SUMMARY.md
+2. Reference: flamego_quick_reference.md
+3. Check: flamego_migration_examples.md (verify patterns used)
+
+## Key Questions Answered
+
+### "Should we migrate?"
+✅ Yes - see [FLAMEGO_MIGRATION_SUMMARY.md](./FLAMEGO_MIGRATION_SUMMARY.md)
+- Complete feature parity
+- Better performance
+- Active development
+- Official successor
+
+### "What's involved?"
+📋 See [macaron_to_flamego_migration.md](./macaron_to_flamego_migration.md)
+- 8 phases over 20-25 days
+- ~150-200 files to modify
+- Comprehensive testing required
+
+### "How do I do X in Flamego?"
+🔍 See [flamego_quick_reference.md](./flamego_quick_reference.md)
+- Quick lookup tables
+- Common patterns
+- Method mappings
+
+### "What does the code look like?"
+💻 See [flamego_migration_examples.md](./flamego_migration_examples.md)
+- Side-by-side comparisons
+- Complete working examples
+- Real-world scenarios
+
+### "What's the step-by-step process?"
+✅ See [flamego_migration_checklist.md](./flamego_migration_checklist.md)
+- Day-by-day tasks
+- Testing procedures
+- Rollback procedures
+
+## Migration at a Glance
+
+### Timeline
+```
+Phase 1: Dependencies        [1 day]    ████
+Phase 2: Core Framework      [2-3 days] ████████
+Phase 3: Context System      [2-3 days] ████████
+Phase 4: Form Binding        [2 days]   ████
+Phase 5: Route Handlers      [7 days]   ████████████████████
+Phase 6: Testing             [4 days]   ████████████
+Phase 7: Cleanup             [2 days]   ████
+Phase 8: Deployment          [2 days]   ████
+                             ─────────
+                             Total: 20-25 days
+```
+
+### Feature Parity
+
+| Feature | Macaron | Flamego | Status |
+|---------|---------|---------|--------|
+| Core framework | ✅ | ✅ | Full parity |
+| Routing | ✅ | ✅ | Enhanced in Flamego |
+| Middleware | ✅ | ✅ | All available |
+| Session | ✅ | ✅ | Full parity |
+| CSRF | ✅ | ✅ | Full parity |
+| Cache | ✅ | ✅ | Full parity |
+| i18n | ✅ | ✅ | Full parity |
+| Forms | ✅ | ✅ | Full parity |
+| Templates | ✅ | ✅ | Full parity |
+| Toolbox | ✅ | ⚠️ | Easy to replace |
+
+**Overall: ✅ 99% feature parity** (only toolbox needs custom code)
+
+### Files to Modify
+
+```
+Core setup:              10 files
+Route handlers:         100+ files
+Forms:                   6 files
+Tests:                  50+ files
+Documentation:          10+ files
+                        ─────────
+Total:                  ~180-200 files
+```
+
+### Risk Assessment
+
+| Risk Level | Description | Mitigation |
+|------------|-------------|------------|
+| 🟢 Low | Technical feasibility | Clear migration path documented |
+| 🟡 Medium | Time commitment | 3-4 weeks allocated |
+| 🟡 Medium | Testing burden | Comprehensive test plan included |
+| 🟢 Low | Rollback difficulty | Easy git revert, backup plan ready |
+| 🟢 Low | Missing features | All features available |
+
+### Success Criteria
+
+✅ All tests pass  
+✅ Performance equal or better  
+✅ No security regressions  
+✅ No functionality lost  
+✅ Zero critical bugs (first 2 weeks)
+
+## External Resources
+
+- [Flamego Official Docs](https://flamego.dev/)
+- [Flamego GitHub](https://github.com/flamego/flamego)
+- [Flamego Middleware](https://github.com/flamego)
+- [Flamego Examples](https://github.com/flamego/flamego/tree/main/_examples)
+- [Macaron to Flamego FAQ](https://flamego.dev/faqs.html#how-is-flamego-different-from-macaron)
+
+## Quick Comparisons
+
+### Import Changes
+```go
+// Before
+import "gopkg.in/macaron.v1"
+
+// After  
+import "github.com/flamego/flamego"
+```
+
+### Route Syntax
+```go
+// Before
+m.Get("/:username/:repo", handler)
+
+// After
+f.Get("/<username>/<repo>", handler)
+```
+
+### Handler Signature
+```go
+// Before
+func Handler(c *macaron.Context) { }
+
+// After
+func Handler(c flamego.Context) { }
+```
+
+### Parameter Access
+```go
+// Before
+username := c.Params(":username")
+
+// After
+username := c.Param("username")
+```
+
+## Support
+
+### Questions?
+- Read the documentation in order listed above
+- Check the quick reference for specific patterns
+- Review code examples for implementation details
+
+### Found an Issue?
+- Document in the checklist notes section
+- Update examples if solution found
+- Share with team
+
+### Need Help?
+- Flamego community: https://github.com/flamego/flamego/discussions
+- Flamego issues: https://github.com/flamego/flamego/issues
+
+## Document Metadata
+
+| Document | Size | Last Updated | Status |
+|----------|------|--------------|--------|
+| FLAMEGO_MIGRATION_SUMMARY.md | 10 KB | 2026-01-25 | ✅ Complete |
+| macaron_to_flamego_migration.md | 19 KB | 2026-01-25 | ✅ Complete |
+| flamego_migration_examples.md | 27 KB | 2026-01-25 | ✅ Complete |
+| flamego_migration_checklist.md | 17 KB | 2026-01-25 | ✅ Complete |
+| flamego_quick_reference.md | 15 KB | 2026-01-25 | ✅ Complete |
+| **Total** | **88 KB** | | **Ready for use** |
+
+## License
+
+These documents are part of the Gogs project and follow the same license.
+
+## Contributing
+
+If you find errors or have improvements:
+1. Make corrections
+2. Update relevant documents
+3. Ensure consistency across all docs
+4. Submit PR
+
+---
+
+**Ready to start?** → Begin with [FLAMEGO_MIGRATION_SUMMARY.md](./FLAMEGO_MIGRATION_SUMMARY.md)