docs: add implementation plan, ADRs, and task tracking system

- Add comprehensive 8-phase implementation plan (docs/plan.md)
- Add 28 Architecture Decision Records (docs/adr/) covering all phases
- Add task tracking system with 283+ task files (docs/stories/)
- Add task generator script for automated task file creation
- Add reference playbooks and requirements documentation

This commit establishes the complete planning foundation for the Go
Platform implementation, documenting all architectural decisions and
providing detailed task breakdown for Phases 0-8.

docs/stories/phase4/4.1.1-create-modulesblog-directory.md

@@ -0,0 +1,58 @@
+# Task 4.1.1: Create `modules/blog/` directory:
+
+## Metadata
+- **Task ID**: 4.1.1
+- **Title**: Create `modules/blog/` directory:
+- **Phase**: 4 - Sample Feature Module (Blog)
+- **Section**: 4.1
+- **Status**: Pending
+- **Priority**: High
+- **Estimated Time**: TBD
+- **Dependencies**: TBD
+
+## Description
+Create `modules/blog/` directory:
+
+## Requirements
+- Create `modules/blog/` directory:
+
+## Implementation Steps
+1. TODO: Add implementation steps
+2. TODO: Add implementation steps
+3. TODO: Add implementation steps
+
+## Acceptance Criteria
+- [ ] Task 4.1.1 is completed
+- [ ] All requirements are met
+- [ ] Code compiles and tests pass
+
+## Related ADRs
+- See relevant ADRs in `docs/adr/`
+
+## Implementation Notes
+- TODO: Add implementation notes
+
+## Testing
+```bash
+# TODO: Add test commands
+go test ./...
+```
+
+
+## Code Reference
+
+```go
+modules/blog/
+  ├── go.mod
+  ├── module.yaml
+  ├── internal/
+  │   ├── api/
+  │   │   └── handler.go
+  │   ├── domain/
+  │   │   ├── post.go
+  │   │   └── post_repo.go
+  │   └── service/
+  │       └── post_service.go
+  └── pkg/
+      └── module.go
+```