feat: add Discord channel, OpenCode runtime, rename to Regolith

- Discord channel integration (discord.js) with mention stripping, attachment tagging, reply context, message chunking
- OpenCode runtime with CLI and SDK modes, SQLite session persistence, idle timeout cleanup
- Multi-channel architecture: WhatsApp + Discord simultaneous or independent via DISCORD_ONLY/DISCORD_BOT_TOKEN
- Config additions: DISCORD_BOT_TOKEN, DISCORD_ONLY, OPENCODE_MODE, OPENCODE_MODEL, OPENCODE_TIMEOUT, OPENCODE_SESSION_TTL_HOURS
- Updated README and CLAUDE.md documentation
- Renamed project to Regolith in package.json

package.json

@@ -1,7 +1,7 @@
 {
-  "name": "nanoclaw",
-  "version": "1.0.0",
-  "description": "Personal Claude assistant. Lightweight, secure, customizable.",
+  "name": "regolith",
+  "version": "2.0.0",
+  "description": "Personal AI assistant with multi-channel support (WhatsApp, Discord) and multi-runtime backends (Claude Agent SDK, OpenCode).",
   "type": "module",
   "main": "dist/index.js",
   "scripts": {
@@ -19,6 +19,7 @@
     "@whiskeysockets/baileys": "^7.0.0-rc.9",
     "better-sqlite3": "^11.8.1",
     "cron-parser": "^5.5.0",
+    "discord.js": "^14.25.1",
     "pino": "^9.6.0",
     "pino-pretty": "^13.0.0",
     "qrcode": "^1.5.4",
@@ -31,6 +32,7 @@
     "@types/node": "^22.10.0",
     "@types/qrcode-terminal": "^0.12.2",
     "@vitest/coverage-v8": "^4.0.18",
+    "fast-check": "^4.5.3",
     "prettier": "^3.8.1",
     "tsx": "^4.19.0",
     "typescript": "^5.7.0",