Accept int (and maybe floats) in operators

[polux]

It would be cool if new Rational(1, 1) >= 0 returned true instead of failing. Same for +, -, *, etc.

[a14n]

I am hesitating on this. On one hand it could simplify operations. But on the other hand, it implies to use dynamic as type annotation for argument and skip all static warnings. Thus new Rational(1) + "abc" would produce no warning.

If I could use union type I would do something like that

operator +(int|Decimal other) => ...;