qfloat16 comparison with integral types is ambiguous

qfloat16 explicitly implements all relational operators for comparing with various FP types (float, double, long double), but for integral types it provides only operators for comparison with int.

As a result, code like that will fail to compile:

qfloat16 f16 = 1.0;
int i = 1;
qint64 i64 = 1;

qDebug() << (f16 == i); // fine, we have explicit operator==(qfloat16, int)
qDebug() << (f16 == i64); // ERROR: ambiguity

This is discovered while working on C++20 comparison story, but this is a pre-existing problem.

So, should we provide comparison operator overloads for all integral types (signed and unsigned)?