docs: add comprehensive documentation for shared packages

- Added README.md for all 6 shared packages:
  - @automaker/types: Type definitions and interfaces
  - @automaker/utils: Utility functions (logger, error handling, images)
  - @automaker/platform: Platform utilities (paths, subprocess, security)
  - @automaker/model-resolver: Claude model resolution
  - @automaker/dependency-resolver: Feature dependency ordering
  - @automaker/git-utils: Git operations and diff generation

- Removed MIT license from all package.json files (using custom dual license)

- Created comprehensive LLM guide (docs/llm-shared-packages.md):
  - When to use each package
  - Import patterns and examples
  - Common usage patterns
  - Migration checklist
  - Do's and don'ts for LLMs

Documentation helps developers and AI assistants understand package purpose,
usage, and best practices.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

libs/utils/package.json

@@ -10,7 +10,6 @@
   },
   "keywords": ["automaker", "utils"],
   "author": "",
-  "license": "MIT",
   "dependencies": {
     "@automaker/types": "^1.0.0"
   },