Error descriptions

[BoySanic]

https://github.com/MinecraftAtHome/clusterizer/blob/master/common/src/errors/not_found.rs#L5

Is there a way to prepend the error message with what wasn't found?
I'm guessing not if we keep it generic, but I thought it was worth checking.

For instance if I launch the client, and the server has no projects/project_versions/platforms, I simply get "not found" back.

It'd be nice if it told me what it didn't find, as it's a little ambiguous.

[DutChen18]

I think we should handle this in the client with map_err.