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/coding-agent/src/cli.ts

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+/**
+ * CLI entry point for the refactored coding agent.
+ * Uses main.ts with AgentSession and new mode modules.
+ *
+ * Test with: npx tsx src/cli-new.ts [args...]
+ */
+process.title = "pi";
+
+import { setBedrockProviderModule } from "@mariozechner/pi-ai";
+import { bedrockProviderModule } from "@mariozechner/pi-ai/bedrock-provider";
+import { EnvHttpProxyAgent, setGlobalDispatcher } from "undici";
+import { main } from "./main.js";
+
+setGlobalDispatcher(new EnvHttpProxyAgent());
+setBedrockProviderModule(bedrockProviderModule);
+
+main(process.argv.slice(2));