feat(setup): add first-class Bionic support

[TimofeySukh]

Summary

• add bionic as a first-class Summer setup and skills target
• publish the public LM Studio MCP discovery entry and support native Bionic user/project Agent Skills
• bind project-scope Bionic connections with cwd and SUMMER_ENGINE_PROJECT
• add capability-gated MCP Roots routing with safe rebinding and race protection
• document current Bionic project-context limitations and the recommended setup flow

Local verification

• npm run build
• npm test — 50 files, 452 tests passed
• bash scripts/smoke-test.sh — 36 passed, 0 failed
• git diff --check
• independent read-only review completed with no remaining findings

Important Bionic behavior

Bionic 1.0.7 and 1.0.9 do not advertise MCP Roots or pass the active Code Project to global MCP processes. The recommended project-scope setup therefore writes a static cwd and SUMMER_ENGINE_PROJECT; users should rerun setup when switching games.