docs: Add CLI Reference lesson (10-cli)

Add comprehensive CLI reference documentation covering:
- All CLI commands and flags with examples
- Model configuration, system prompts, permissions
- Output formats (text, JSON, stream-JSON)
- Session management and MCP configuration
- 7 high-value use cases: CI/CD, piping, batch processing,
  multi-session workflows, custom agents, security, JSON API

Update README.md and LEARNING-ROADMAP.md with CLI lesson
navigation and learning path integration.

openspec/changes/add-cli-lesson/tasks.md

@@ -2,8 +2,8 @@
 
 ## 1. Create CLI Lesson Content
 
-- [ ] 1.1 Create `10-cli/` directory
-- [ ] 1.2 Create `10-cli/README.md` with:
+- [x] 1.1 Create `10-cli/` directory
+- [x] 1.2 Create `10-cli/README.md` with:
   - Overview section with architecture diagram
   - CLI commands table (claude, claude "query", claude -p, etc.)
   - Core flags section with examples
@@ -23,28 +23,28 @@
 
 ## 2. Add Use Case Examples
 
-- [ ] 2.1 CI/CD integration example (GitHub Actions, Jenkins)
-- [ ] 2.2 Script piping example (log analysis, code processing)
-- [ ] 2.3 Multi-session workflow example
-- [ ] 2.4 Custom agent configuration example
-- [ ] 2.5 Batch processing example
-- [ ] 2.6 Security-conscious development example
-- [ ] 2.7 JSON API integration example
+- [x] 2.1 CI/CD integration example (GitHub Actions, Jenkins)
+- [x] 2.2 Script piping example (log analysis, code processing)
+- [x] 2.3 Multi-session workflow example
+- [x] 2.4 Custom agent configuration example
+- [x] 2.5 Batch processing example
+- [x] 2.6 Security-conscious development example
+- [x] 2.7 JSON API integration example
 
 ## 3. Update Root Documentation
 
-- [ ] 3.1 Add CLI to Quick Navigation table in `README.md`
-- [ ] 3.2 Add CLI to Learning Path table in `README.md`
-- [ ] 3.3 Add CLI section (section 10) in `README.md`
-- [ ] 3.4 Add CLI to Feature Comparison table
-- [ ] 3.5 Add CLI to Use Case Matrix
-- [ ] 3.6 Add CLI to Directory Structure tree
-- [ ] 3.7 Add CLI to Installation Quick Reference
-- [ ] 3.8 Update `LEARNING-ROADMAP.md` with CLI lesson
+- [x] 3.1 Add CLI to Quick Navigation table in `README.md`
+- [x] 3.2 Add CLI to Learning Path table in `README.md`
+- [x] 3.3 Add CLI section (section 10) in `README.md`
+- [x] 3.4 Add CLI to Feature Comparison table
+- [x] 3.5 Add CLI to Use Case Matrix
+- [x] 3.6 Add CLI to Directory Structure tree
+- [x] 3.7 Add CLI to Installation Quick Reference
+- [x] 3.8 Update `LEARNING-ROADMAP.md` with CLI lesson
 
 ## 4. Quality Assurance
 
-- [ ] 4.1 Verify all code examples are valid and tested
-- [ ] 4.2 Ensure consistent style with other lessons (mermaid diagrams, tables)
-- [ ] 4.3 Check all internal links work correctly
-- [ ] 4.4 Review against official documentation for accuracy
+- [x] 4.1 Verify all code examples are valid and tested
+- [x] 4.2 Ensure consistent style with other lessons (mermaid diagrams, tables)
+- [x] 4.3 Check all internal links work correctly
+- [x] 4.4 Review against official documentation for accuracy