Add Claude Review Bot

Add the claude review bot to the repo.

Referenced github workflow yml: https://github.com/citadel-tech/coinswap/blob/master/.github/workflows/claude-code-review.yml

If you already have claude in your system, run `/init` in cluade code to generate the CLAUDE.md file for this project. Add that file also in the repo root. This will enhance the review bot and reduce compute time.