Provide three very simple AI examples

[jeremiaswerner]

This PR adds three very simple AI examples to allow users a quick start.

1. Agent - Deploy a very simple AI agent with tools and tasks using ACP and CrewAI to Code Engine
2. FastMCP - Deploy a very basic MCP server using FastMCP to Code Engine
3. LangFlow - Deploy LangFlow to Code Engine with COS as the persistent data store

All three examples contain a README with explanation as well as a deploy.sh script that creates all the requires resources in the IBM Cloud.