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/phase4/4.2.1-create-modulesblogmoduleyaml.md

@@ -0,0 +1,70 @@
+# Task 4.2.1: Create `modules/blog/module.yaml`:
+
+## Metadata
+- **Task ID**: 4.2.1
+- **Title**: Create `modules/blog/module.yaml`:
+- **Phase**: 4 - Sample Feature Module (Blog)
+- **Section**: 4.2
+- **Status**: Pending
+- **Priority**: High
+- **Estimated Time**: TBD
+- **Dependencies**: TBD
+
+## Description
+Create `modules/blog/module.yaml`:
+
+## Requirements
+- Create `modules/blog/module.yaml`:
+
+## Implementation Steps
+1. TODO: Add implementation steps
+2. TODO: Add implementation steps
+3. TODO: Add implementation steps
+
+## Acceptance Criteria
+- [ ] Task 4.2.1 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
+name: blog
+  version: 0.1.0
+  dependencies:
+    - core >= 1.0.0
+  permissions:
+    - blog.post.create
+    - blog.post.read
+    - blog.post.update
+    - blog.post.delete
+  routes:
+    - method: POST
+      path: /api/v1/blog/posts
+      permission: blog.post.create
+    - method: GET
+      path: /api/v1/blog/posts/:id
+      permission: blog.post.read
+    - method: PUT
+      path: /api/v1/blog/posts/:id
+      permission: blog.post.update
+    - method: DELETE
+      path: /api/v1/blog/posts/:id
+      permission: blog.post.delete
+    - method: GET
+      path: /api/v1/blog/posts
+      permission: blog.post.read
+```