Refactored HandManager and Added comprehensive test coverage for HandManager

[Grimmblood]

Describe your changes

Commented out the debug tools of HandManager, as well as removed some now unused methods.
Added Comprehensive test coverage for HandManager.

Issue number and link

N/A

Screenshots (if appropriate):

Types of changes

• Bug fix (fixes a issue)
• New feature (new implemention of a feature)
• Refactoring (small changes that won't impact very much)
• Possible broken change (fix or feature that could break functionality)

Checklist:

• Have added comments and documentation
• You have tested all the code thoroughly
• I have added tests to cover my changes.
  Or have added an issue that tests need to be added.
• If scene changes were made were they in a separate scene (Doesn't apply to CodingAdam)

[CodingAdam]

Nice job, thanks for the screenshot, gives a good idea of what works. This should help a lot with coverage and 7 lines is fine if we can't get those.

[GNAR1ZARD]

Approving hot fix for coverage increase due to deadline --no conflict/flag.