Add more control for inlay hints on function return types (e.g., suppress None)

[Contrabang]

The current setting python.analysis.inlayHints.functionReturnTypes is useful, but it applies uniformly to all functions. This can introduce some unnecessary visual noise, especially in contexts like test files (e.g., when using pytest), where most functions implicitly return None. When many functions return None, displaying inlay hints for each one adds clutter without providing meaningful information.

This could be improved by:

• Adding an option to suppress hints for specific types (e.g., None)
• Adding a dedicated setting such as python.analysis.inlayHints.functionReturnTypes.suppressNone
• More generally, supporting user-defined suppression rules for return types

Example

# None Suppression Disabled
def foo(x: int) '-> int':
    return x

def bar() '-> None':
    pass

# None Suppression Enabled
def foo(x: int) '-> int':
    return x

def bar():
    pass

[rchiodo]

Thanks for the suggestion. Moving to discussions for up votes.