feat(#756): add official Discord channel adapter

plugins/discord/package.json

@@ -19,13 +19,16 @@
     "dev": "tsx watch src/index.ts",
     "lint": "eslint src",
     "typecheck": "tsc --noEmit",
-    "test": "vitest run --passWithNoTests"
+    "test": "vitest run --coverage",
+    "test:coverage": "vitest run --coverage"
   },
   "dependencies": {
+    "@mosaicstack/types": "workspace:^",
     "discord.js": "^14.16.0",
     "socket.io-client": "^4.8.0"
   },
   "devDependencies": {
+    "@vitest/coverage-v8": "^2.0.0",
     "tsx": "^4.0.0",
     "typescript": "^5.8.0",
     "vitest": "^2.0.0"