Please use kb-manager to initialize a knowledge base.

Requirements:
1. Create a `knowledge/` directory in the current workspace
2. Create standard subdirectories:
   - 00_inbox
   - 01_reference
   - 02_learning
   - 03_projects
   - 04_research
   - 05_playbooks
   - 06_prompts
   - 99_archive
   - _meta
3. Copy `docs/classification-rules.md` to `knowledge/_meta/classification-rules.md`
4. Copy `docs/naming-rules.md` to `knowledge/_meta/naming-rules.md`
5. Copy `templates/default-entry.md` to `knowledge/_meta/template.md` as the active template
6. Create `knowledge/_meta/README.md` and `knowledge/_meta/intake-log.md`
7. Keep optional index files for later unless explicitly requested:
   - `knowledge/_meta/topics.md`
   - `knowledge/_meta/projects-index.md`
   - `knowledge/_meta/recent.md`
8. Use `templates/project-entry.md` for project-related content
9. Put uncertain items into `00_inbox`
10. Output the created structure and the initialized meta files
