Prometheus: Add README for WIP-KIP-31#2

Alexdyn1927 wants to merge 1 commit intokoii-network:mainkoii-network/WIP-KIP-31:mainfrom

Alexdyn1927:feature-create-project-readme-1745865745Alexdyn1927/WIP-KIP-31:feature-create-project-readme-1745865745Copy head branch name to clipboard