Refactor project layout and fix workspace/subagent paths
- Remove global workspace (workspace/) — all data migrated to .smallclaw/
- Move ppt/ skins & templates to .smallclaw/skills/presenter/ppt/
- Add .smallclaw/templates/ for user bootstrap files
- Move dental_images to .smallclaw/databases/, update 1,485 DB entries
- Fix subagent store paths to use SMALLCLAW_DATA_DIR instead of workspace.path
- Per-user Telegram bots: MultiUserTelegramManager, vault-stored tokens
- Fix Telegram token persistence (vault fallback, strip from config.json)
- Fix session migration: delete global originals even when skipping
- Delete unused root images, MD docs, tests/, smallclawworkspace/ artifacts
- Add meteorologist skill, counselor skill, presenter skill scaffold
- Strip workspace.path from config.json (was causing path confusion)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>