move pi-mono into companion-cloud as apps/companion-os

- Copy all pi-mono source into apps/companion-os/
- Update Dockerfile to COPY pre-built binary instead of downloading from GitHub Releases
- Update deploy-staging.yml to build pi from source (bun compile) before Docker build
- Add apps/companion-os/** to path triggers
- No more cross-repo dispatch needed

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/agent/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@mariozechner/pi-agent-core",
+  "version": "0.56.2",
+  "description": "General-purpose agent with transport abstraction, state management, and attachment support",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist",
+    "README.md"
+  ],
+  "scripts": {
+    "clean": "shx rm -rf dist",
+    "build": "tsgo -p tsconfig.build.json",
+    "dev": "tsgo -p tsconfig.build.json --watch --preserveWatchOutput",
+    "test": "vitest --run",
+    "prepublishOnly": "npm run clean && npm run build"
+  },
+  "dependencies": {
+    "@mariozechner/pi-ai": "^0.56.2"
+  },
+  "keywords": [
+    "ai",
+    "agent",
+    "llm",
+    "transport",
+    "state-management"
+  ],
+  "author": "Mario Zechner",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/getcompanion-ai/co-mono.git",
+    "directory": "packages/agent"
+  },
+  "engines": {
+    "node": ">=20.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^24.3.0",
+    "typescript": "^5.7.3",
+    "vitest": "^3.2.4"
+  }
+}