Add Oh My Pi and improve dev container config

- Install @oh-my-pi/pi-coding-agent and move Go binaries to /usr/local/bin
- Add omp-data volume and make web port configurable via PORT_WEB
- Replace aider self-check with omp in Makefile
- Harden entrypoint: avoid exporting API keys to SSH env and overwrite
  mounted public key into authorized_keys
- Add .dockerignore, simplify .env.example, and document omp in README

vibe-dev/Makefile

@@ -67,8 +67,8 @@ check:
 	@docker exec -it $(CONTAINER_NAME) rustc --version || echo "❌ Rust 未就绪"
 	@docker exec -it $(CONTAINER_NAME) go version || echo "❌ Go 未就绪"
 	@docker exec -it $(CONTAINER_NAME) bun --version || echo "❌ Bun 未就绪"
-	@docker exec -it $(CONTAINER_NAME) aider --version || echo "❌ Aider 未就绪"
 	@docker exec -it $(CONTAINER_NAME) opencode version || echo "❌ OpenCode 未就绪"
+	@docker exec -it $(CONTAINER_NAME) omp --version || echo "❌ Oh My Pi 未就绪"
 	@echo "✨ 自检完成！"
 
 add-key: