feat: complete Dirigent rename + all TASKLIST items

- Task 1: Identity prompt now includes Discord userId
- Task 2: Added configurable schedulingIdentifier (default: ➡️)
- Task 3: Moderator handoff uses <@userId>+identifier instead of semantic messages
- Task 4: All prompts/comments/help text converted to English
- Task 5: Full project rename WhisperGate → Dirigent across all files

Breaking: config key changed from plugins.entries.whispergate to plugins.entries.dirigent
Breaking: channel policies file renamed to dirigent-channel-policies.json
Breaking: tool name changed from whispergate_tools to dirigent_tools

plugin/package.json

@@ -1,9 +1,9 @@
 {
-  "name": "whispergate-plugin",
-  "version": "0.1.0",
+  "name": "dirigent-plugin",
+  "version": "0.2.0",
   "private": true,
   "type": "module",
-  "description": "WhisperGate OpenClaw plugin",
+  "description": "Dirigent OpenClaw plugin",
   "scripts": {
     "check": "node ../scripts/check-plugin-files.mjs",
     "check:rules": "node ../scripts/validate-rules.mjs"