feat: generalize Docker services

[pkudinov]

Summary

This replaces the Redis-specific Docker path with a generic dockerServices configuration model. Redis is now just another declared Docker service, and legacy type: "redis" env patches are removed as a breaking change.

What changed

• Added generic Docker Compose-backed service lifecycle management from wt.config.json.
• Starts configured Docker services only after the per-slot database has been created.
• Groups per-slot services in Docker Desktop under projects like wt-<slot>-<repo>-<hash>.
• Updated registry/output/remove/prune flows to track and clean up generic Docker projects.
• Removed the old managed-redis module and Redis patch type.
• Updated docs, skill guidance, and Docker integration tests for the new model.
• Added a clean build step so deleted modules cannot linger in dist.
• Added wt-local local build wiring and bumped the breaking-change version to 0.4.0.

Impact

Configs using type: "redis" must switch to type: "url" for REDIS_URL and declare Redis under dockerServices. Electric and Redis can now both live in wt.config.json instead of a checked-in Docker Compose file.

Validation

• pnpm lint
• pnpm build
• pnpm test --runInBand
• pnpm test:docker
• Local smoke test in ~/sources/tokenbooks with Redis and Electric in slot 22