feat: Daemon modularization + capability-gated command routing + CI/test pipeline

[thymikee]

Summary
This PR breaks up the daemon monolith into focused handler/shared modules, centralizes command support checks in a capability matrix, and adds a fuller CI workflow with clearer unit vs integration test boundaries.

What changed

• Daemon refactor into command-family handlers and shared domain modules:
  • Added session, snapshot, find, and record/trace handlers.
  • Added shared modules for context building, device readiness, app-state resolution, session store, session routing/selector validation, snapshot processing, and daemon types.
  • Simplified src/daemon.ts to route requests through these modules.
• Session behavior improvements:
  • Added implicit reuse of a lone active session when default session is requested.
  • Added selector mismatch validation (--platform/--udid/--serial) against bound session device.
  • Kept/strengthened session recording/logging behavior via SessionStore.
• Capability source of truth:
  • Added src/core/capabilities.ts and wired checks from daemon/handlers.
  • Added capability unit tests.
  • Pinch is now capability-gated as iOS simulator-only in core capability policy.
• Dispatch cleanup:
  • Removed scattered iOS-kind support checks from several command branches and rely on capability gating.
  • Kept pinch dispatch via iOS runner path.
• Testing structure updates:
  • Added colocated daemon/core unit tests for capabilities, session routing/selector/store, snapshot processing, and handler arg parsing.
  • Moved smoke tests into integration test tree and updated scripts.
• CI/workflow updates:
  • Added reusable composite action .github/actions/setup-node-pnpm.
  • Added .github/workflows/ci.yml with unit, typecheck, smoke, Android integration, and iOS integration jobs.
  • Updated docs deploy checkout pin and build-docs action to use shared setup action.
• Documentation/instructions:
  • Rewrote AGENTS.md with stricter ownership, first-read protocol, and verification matrix.
  • Updated command docs for pinch examples.

Validation run locally

• pnpm typecheck
• pnpm test:unit
• pnpm test:smoke

[github-actions]

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[grabbou]

Why no AI bots (or my, at the latest 😂) are summoned to review this beauty