refactor: move `state.State` to public package

[utkuozdemir]

Export the state struct from the internal package into a public package. It is a dependency of the ClusterServer GRPC service - so to be able to import and use it, the state also needs to be exported.

[smira]

Does it make sense to export the entrypoint, i.e. cmd/main.go as a function in a package?

[utkuozdemir]

Does it make sense to export the entrypoint, i.e. cmd/main.go as a function in a package?

Hm, maybe not exactly that, as lots of other things going on there, but probably exporting the code that builds the state + grpc server struct + storage as a single function could work.

[smira]

Does it make sense to export the entrypoint, i.e. cmd/main.go as a function in a package?

Hm, maybe not exactly that, as lots of other things going on there, but probably exporting the code that builds the state + grpc server struct + storage as a single function could work.

yeah, I mean exactly something like that