refactor: align package folder names with npm package names

Rename packages/ subdirectories to match their @united-workforce/* scope:
  cli-workflow → cli
  workflow-agent-builtin → agent-builtin
  workflow-agent-claude-code → agent-claude-code
  workflow-agent-hermes → agent-hermes
  workflow-dashboard → dashboard
  workflow-protocol → protocol
  workflow-util-agent → util-agent
  workflow-util → util

Updated all tsconfig references, scripts, and active docs.
Historical docs (docs/plans/, docs/superpowers/) left as-is.

Closes #21

docs/sync-readme.md

@@ -16,7 +16,7 @@ The root README should have these sections in order:
 3. **Architecture** — dependency layer diagram (text-based)
 4. **Packages** — table with ALL packages from packages/ directory, columns: Package, Description, Type (cli/lib/agent/app)
 5. **Quick Start** — install, build, register workflow, start thread, run step
-6. **CLI Reference** — brief command list, detailed usage in cli-workflow README
+6. **CLI Reference** — brief command list, detailed usage in cli README
 7. **Development** — bun install / build / check / test
 
 ## Per-Package README Structure