Bump version to 0.0.4

[amphetamarina]

Cuts the v0.0.4 release: bumps package.json to 0.0.4. After merge, tag the
merge commit v0.0.4 (annotated) to match the existing release-tag convention
(v0.0.2, v0.0.3).

What shipped in v0.0.4

• In-game terminal panel restyled like OpenRA's native chat UI: a framed panel, a
  toggle to switch the bound terminal (or All), a composer to message the agent, and
  a close button (AMP-231).
• Backend refactor (AMP-183): server/index.ts split into layered modules
  (AgentRegistry, FileRegistry, WorkDirTracker, ingest state machine, transcript-sync,
  WorldService, Broadcaster, HTTP/WS transport), with index.ts reduced to a
  composition root. Named Outcome replaces the tri-state ok; Agent split into
  identity/live; /ingest validated at the boundary.
• TS/C# wire-protocol contract test guards client/server drift (AMP-196).
• GitHub Actions CI: typecheck, test, and the OpenRA mod build on every push.
• Trimmed to a focused Claude + Codex agent set (removed Grok, Hermes, and opencode
  adapters); removed dead code and superseded design docs.

🤖 Generated with Claude Code