Expose the 7 Klavis Strata MCP tools as CLI subcommands under
`browseros-cli strata`, so CLI users (claude-code, gemini-cli) can
discover and execute actions on 40+ external services.
Commands: check, discover, actions, details, exec, search, auth.
Includes discovery flow guidance in help text, integration tests,
and an "Integrations:" group in the root help output.