refactor claude.md files across the repo

[priyanshujain]

1. File in root should talk about the structure of the project and details of the project but no commands to run. no details about file of each service or module
2. services/claude.md should talk about the services and modules, their purpose, and how to run them. no details about the individual service and files within the services. no commands to run as well
3. services/*/claude.md should talk about the details of individual service, its purpose, and how to run it and how to test it. It should also include any standards and conventions to follow when building this service.
4. cli/claude.md should talk about the CLI, its purpose, and how to run it, any standards and conventions to follow when building this