Feature request: please implement op_mod for Float and Double

[gmlewis]

All the integer types implement op_mod but Float and Double do not.

According to this: https://pkg.go.dev/math#Mod

Mod returns the floating-point remainder of x/y. The magnitude of the result is less than y and its sign agrees with that of x.

Special cases are:

Mod(±Inf, y) = NaN
Mod(NaN, y) = NaN
Mod(x, 0) = NaN
Mod(x, ±Inf) = x
Mod(x, NaN) = NaN