TODO
- /friend add command is behaving weird: silent return no error
  - improve error handling in Task ig
  - try with InMemory db and debug postgres implementation
- logging in general, log some exceptions to game chat
- notification: Friend is now offline/online
- messages across server
- /ignore command

environment
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- **core-lib**: stateless library
- **core-bukkit** stateful plugin/api for minecraft development, depends on core-lib
- **core-velocity** stateful plugin/api for proxy development, depends on core-lib