Refactor legacy files related to `BaseStats`

[hburn7]

• Removes all references to base stats
• Refactors and renames old base stat files to player rating naming scheme
• Removes some unused / legacy methods
• Fixes docstrings and naming schemes in some places

[github-actions[bot]]

Qodana for .NET

4 new problems were found

Inspection name	Severity	Problems
Not accessed primary constructor parameter	🔶 Warning	1
Redundant using directive	🔶 Warning	1
Use collection's count property	◽️ Notice	2

💡 Qodana analysis was run in the pull request mode: only the changed files were checked ☁️ View the detailed Qodana report

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[hburn7]

I borked too much. I'm gonna nuke and try this again later.