Implement IEqualityOperators for autotypes

[wherewhere]

Is your feature request related to a problem? Please describe.

Implement IEqualityOperators when has equality operator. It may be useless but nice to have it. Since standard library has this interface, why not don't implement it?

(Since C# can't quack, it is useful in generic. It will be better to have this.

Describe the solution you'd like

Such as:

partial struct HINSTANCE : System.Numerics.IEqualityOperators<HINSTANCE, HINSTANCE, bool>;

Additional context

It will be better if autotypes can implement every numeric static interface if it has that function.