fix(docs): critical factual corrections v3.6.1

Major audit correcting misleading documentation about Claude Code behavior:

### Fixed
- `--add-dir`: permissions (not context loading)
- `excludePatterns` → `permissions.deny` (never existed)
- `.claudeignore` removed (not an official feature)
- "selective loading" myth → lazy loading reality
- Invented CLI flags (`--think`, `--headless`, `--learn`) → prompt keywords
- `@` file reference: "loads automatically" → "reads on-demand"

### Added
- Session Search Tool (`cs`) - zero-dep bash script for finding sessions
- Security section: Known limitations of permissions.deny

15 files modified, 516 insertions, 200 deletions

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

examples/README.md

@@ -107,8 +107,11 @@ Ready-to-use templates for Claude Code configuration.
 | [clean-reinstall-claude.sh](./scripts/clean-reinstall-claude.sh) | Clean reinstall procedure (macOS/Linux) | Human |
 | [clean-reinstall-claude.ps1](./scripts/clean-reinstall-claude.ps1) | Clean reinstall procedure (Windows) | Human |
 | [session-stats.sh](./scripts/session-stats.sh) | Analyze session logs & costs | JSON / Human |
+| [session-search.sh](./scripts/session-search.sh) | Fast session search & resume | Human |
 
 > **Usage**: `./audit-scan.sh` for human output, `./audit-scan.sh --json` for JSON output
+>
+> **Session search**: `./session-search.sh "keyword"` to find past conversations, outputs ready-to-use `claude --resume` commands
 
 ### GitHub Actions
 | File | Trigger | Purpose |