feat(stats): add simple ingame statistics

[theEvilReaper]

Proposed changes

Currently, the game does not provide any kind of statistics. Before introducing a dedicated statistics module, it makes sense to integrate some basic in game statistics first. This pull request collects several metrics during a game and displays them to the player once the game has ended. The collected data is not stored in a file or database, as persistent storage will be implemented in a separate step.

Types of changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of
them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before
merging your code.

• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[github-actions]

Test results

231 files  231 suites   1m 44s ⏱️
277 tests 272 ✅  5 💤 0 ❌
834 runs  819 ✅ 15 💤 0 ❌

Results for commit b80779e.

[TheMeinerLP]

LGTM