feat: add Learning Paths, examples, and project governance files

### New Content
- Learning Paths section in README (Junior/Senior/Power User/PM tracks)
- examples/ folder with 18 ready-to-use templates:
  - 4 agents (code-reviewer, test-writer, security-auditor, refactoring)
  - 2 skills (TDD workflow, security checklist)
  - 3 commands (commit, review-pr, generate-tests)
  - 4 hooks (bash + PowerShell for security, formatting)
  - 3 config templates (settings, MCP, gitignore)
  - 2 memory templates (project + personal CLAUDE.md)

### Governance
- CHANGELOG.md: Version history (1.0.0 → 1.1.0 → Unreleased)
- CONTRIBUTING.md: Contribution guidelines for community

### Documentation
- llms.txt: Updated structure with new files/folders

This update makes the guide more actionable with concrete templates
and provides clear learning paths for different skill levels.

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

examples/commands/commit.md

@@ -0,0 +1,68 @@
+# Conventional Commit
+
+Generate a conventional commit message for staged changes.
+
+## Instructions
+
+1. Run `git diff --cached` to see staged changes
+2. Analyze the nature of changes
+3. Generate a commit message following the format below
+
+## Commit Format
+
+```
+<type>(<scope>): <subject>
+
+[optional body]
+
+[optional footer]
+```
+
+### Types
+- `feat`: New feature
+- `fix`: Bug fix
+- `docs`: Documentation only
+- `style`: Formatting, missing semicolons, etc.
+- `refactor`: Code change that neither fixes nor adds feature
+- `perf`: Performance improvement
+- `test`: Adding missing tests
+- `chore`: Maintenance tasks
+
+### Rules
+- Subject: imperative mood, no period, max 50 chars
+- Body: explain WHAT and WHY, not HOW
+- Footer: breaking changes, issue references
+
+## Examples
+
+```
+feat(auth): add password reset functionality
+
+Implement password reset flow with email verification.
+Users can now request a reset link and set new password.
+
+Closes #123
+```
+
+```
+fix(api): prevent race condition in order processing
+
+Add mutex lock to ensure orders are processed sequentially.
+This fixes duplicate charge issues reported by users.
+
+Fixes #456
+```
+
+```
+refactor(cart): extract pricing logic to separate module
+
+No functional changes. Improves testability and
+separates concerns for future discount feature.
+```
+
+## Execution
+
+After analyzing staged changes, suggest a commit message.
+Ask for confirmation before executing `git commit -m "..."`.
+
+$ARGUMENTS