Implementation Plan Executor Prompt

AI prompt to review and execute implementation plans step-by-step with changelog and README updates

- Please review the implementation plan found at docs/IMPLEMENTATION.md
- Think deeply and implement the "PR 1" Phase of the plan.
- If needed, please review the plan at docs/OVERVIEW.md for overall context on what we are building
- When complete, please update the changelog at CHANGELOG.md
- If applicable, update the README.md when complete as well.