TYP: Track progress of pyright rules

[twoertwein]

Pyright has many rules, but currently most of them are disabled.

Here is a list of all currently disabled rules and in bracket the number of violations (grep -c) to have a rough idea how much effort enabling a certain rule is:

"Core" Typing:

• reportGeneralTypeIssues (2322)
• reportFunctionMemberAccess (5)
• reportIncompatibleMethodOverride (313)
• reportIncompatibleVariableOverride (11)
• reportMissingTypeArgument (369)
• reportOptionalCall (8)
• reportOptionalIterable (6)
• reportOptionalMemberAccess (478)
• reportOptionalOperand (7)
• reportOptionalSubscript (34)
• reportPropertyTypeMismatch (1)

Third-Party/Conventions/Other:

• reportConstantRedefinition (21)
• reportImportCycles (40)
• reportMissingModuleSource (2)
• reportMissingTypeStubs (102)
• reportPrivateImportUsage (3)
• reportPrivateUsage (765)
• reportUnboundVariable (70)
• reportUnknownArgumentType (11458)
• reportUnknownLambdaType (304)
• reportUnknownMemberType (21661)
• reportUnknownParameterType (10035)
• reportUnknownVariableType (12947)
• reportUnnecessaryComparison (35)
• reportUnnecessaryIsInstance (86)
• reportUnsupportedDunderAll (1)
• reportUntypedBaseClass (18)
• reportUntypedFunctionDecorator (3)
• reportUnusedClass (2): used for compatibility in pickle
• reportUnusedFunction (6): needs a discussion whether these private functions should either be moved or made public
• reportUnusedImport (292): could be enabled if __all__ or redundant import were used
• reportUnusedVariable (67): needs consensus to start unused variables with _.

[twoertwein]

Closing this issue as it is not actionable.

The key goal is to enable reportGeneralTypeIssues which we will hopefully slowly achieve once more of the pandas code base is typed (especially the return values).