feat(adapters): external adapter plugin system with dynamic UI parser

- Plugin loader: install/reload/remove/reinstall external adapters
  from npm packages or local directories
- Plugin store persisted at ~/.paperclip/adapter-plugins.json
- Self-healing UI parser resolution with version caching
- UI: Adapter Manager page, dynamic loader, display registry
  with humanized names for unknown adapter types
- Dev watch: exclude adapter-plugins dir from tsx watcher
  to prevent mid-request server restarts during reinstall
- All consumer fallbacks use getAdapterLabel() for consistent display
- AdapterTypeDropdown uses controlled open state for proper close behavior
- Remove hermes-local from built-in UI (externalized to plugin)
- Add docs for external adapters and UI parser contract

packages/adapters/claude-local/src/index.ts

@@ -21,7 +21,7 @@ Core fields:
 - chrome (boolean, optional): pass --chrome when running Claude
 - promptTemplate (string, optional): run prompt template
 - maxTurnsPerRun (number, optional): max turns for one run
-- dangerouslySkipPermissions (boolean, optional): pass --dangerously-skip-permissions to claude
+- dangerouslySkipPermissions (boolean, optional, default true): pass --dangerously-skip-permissions to claude; defaults to true because Paperclip runs Claude in headless --print mode where interactive permission prompts cannot be answered
 - command (string, optional): defaults to "claude"
 - extraArgs (string[], optional): additional CLI args
 - env (object, optional): KEY=VALUE environment variables