feat: Add skills-search skill for CCPM registry

- Add skills-search v1.0.0: Search, discover, install, and manage Claude Code skills from CCPM registry
- Track docs-cleaner skill that was already in marketplace.json
- Update marketplace version from 1.15.0 to 1.16.0
- Update skill count from 22 to 23 across all documentation
- Add skills-search section to README.md and README.zh-CN.md
- Add CCPM CLI to requirements section
- Add use case section for skill discovery & management

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

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

docs-cleaner/references/value_analysis_template.md

@@ -0,0 +1,50 @@
+# Value Analysis Template
+
+Use this template for section-by-section documentation analysis.
+
+## Document Analysis Table
+
+| Section | Lines | Value | Reason |
+|---------|-------|-------|--------|
+| Example Section | 25 | Keep | Contains unique troubleshooting steps not documented elsewhere |
+| Another Section | 40 | Delete | Duplicates content in CLAUDE.md |
+| Technical Details | 60 | Condense | Valuable but verbose; can be reduced to 15 lines |
+| Setup Instructions | 30 | Keep | Essential for onboarding |
+
+## Value Categories
+
+### Keep (Green)
+- Unique information not found elsewhere
+- Essential procedures (setup, troubleshooting, constraints)
+- Frequently referenced content
+- Technical debt / roadmap items
+
+### Condense (Yellow)
+- Valuable but overly verbose
+- Contains redundant examples
+- Can be expressed more concisely
+
+### Delete (Red)
+- Duplicates existing documentation
+- One-time records (test results, meeting notes)
+- Self-evident information (code already documents this)
+- Outdated or superseded content
+
+## Consolidation Checklist
+
+Before proposing deletions:
+
+- [ ] Identified ALL files containing related content
+- [ ] Mapped overlap between documents
+- [ ] Listed unique value in each document
+- [ ] Proposed single source of truth location
+- [ ] Planned reference updates (CLAUDE.md, README, etc.)
+
+## Output Format
+
+After analysis, produce:
+
+1. **Value Analysis Table** - Per-section breakdown with keep/condense/delete
+2. **Consolidation Plan** - Target structure with line count estimates
+3. **Before/After Comparison** - Total lines and percentage reduction
+4. **Preserved Value Checklist** - Confirm all valuable content retained