[php-src] Issue #22128: BcMath\Number::createFrom

Issue: https://github.com/php/php-src/issues/22128
Author: whataboutpereira

### Description

Any plans to add a static creator function to BcMath\Number akin to DateTime::createFromImmutable() etc functions?

It would allow turning values to Number objects without additional code in object mapper transformers etc where you could simply pass Number::createFrom(...) as transformer.