fix: Glama score — add server config, badge, sync version to 2.0.20

- glama.json: add command, tools list, description for server inspection
- README: add Glama score badge
- package.json: sync version to match npm 2.0.20

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Add MCP stdio server + Dockerfile for Glama inspection

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Expand npm keywords for discoverability