refactor: move server, store, hook, middleware to internal package

[mabdh]

Summary

• Move hook and middleware package to proxy package and move proxy package to internal package
• Move server and store to internal package
• Move api/handler to internal as it is only being used by internal packages
• Do component creation only on cmd level
• Remove unnecessary log fatal from the main code, log fatal and panic should only be allowed to be executed in cmd, return error instead
• Decouple api.Dependencies from v1beta1
• Move server and proxy serving to server and proxy package
• Fix graceful shutdown of all storages, proxies, and server
• Move resources and rules config to config folder
• Move logger and grpc_interceptor to pkg
• Rename Id to ID

[mabdh]

This will also close bug in #129