chore: add pnpm workspace configuration with only built dependencies

package.json

@@ -3,9 +3,10 @@
   "version": "1.0.0",
   "description": "Discord bot that joins a voice channel and records audio",
   "main": "src/index.ts",
+  "packageManager": "pnpm@10.25.0",
   "scripts": {
-    "dev": "bun --watch src/index.ts",
-    "start": "bun src/index.ts",
+    "dev": "tsx watch src/index.ts",
+    "start": "tsx src/index.ts",
     "build": "tsc --outDir dist",
     "typecheck": "tsc --noEmit",
     "lint": "biome check --diagnostic-level=error .",
@@ -39,9 +40,10 @@
     "@types/better-sqlite3": "^7.6.13",
     "@types/express": "^5.0.6",
     "@types/fluent-ffmpeg": "^2.1.28",
+    "@types/node": "^24.10.1",
     "@types/ws": "^8.18.1",
-    "bun-types": "latest",
     "pino-pretty": "^10.3.1",
+    "tsx": "^4.20.6",
     "vitest": "latest"
   }
 }