Replace SQLite with JSON file storage

- Remove database.py (SQLite) from tools/storage/ and dss-mvp1/
- Add json_store.py with full JSON-based storage layer
- Update 16 files to use new json_store imports
- Storage now mirrors DSS canonical structure:
  .dss/data/
  ├── _system/    (config, cache, activity)
  ├── projects/   (per-project: tokens, components, styles)
  └── teams/      (team definitions)
- Remove Docker files (not needed)
- Update DSS_CORE.json to v1.1.0

Philosophy: "Eat our own food" - storage structure matches DSS design

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

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

tools/figma/figma_tools.py

@@ -38,7 +38,7 @@ import httpx
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
 from config import config
-from storage.database import Cache, ActivityLog
+from storage.json_store import Cache, ActivityLog
 
 @dataclass
 class DesignToken: