Achievements and Statistics

**Description**
Implement achievements and statistics, found on minecraft settings, to keep track of the player goals.
That **SHOULD BE DONE** in a separated module and not incorporated in the player object, so it can be easily disabled for servers that do not need it.

**Checklist**
- [ ] Achievements
- [ ] Statistics

No files, tests, or entry points are named in the issue. Begin by locating the server's player and module structures, then define a separate, optionally disabled module that implements both achievements and statistics; completion means both checklist items work without incorporating the functionality into the player object.

Written by the indexing model from the issue text.