Feature request

I found that phpstan doesn't understand psalms numeric-string type (see https://psalm.dev/docs/annotating_code/type_syntax/scalar_types/#numeric-string)
It would be nice to support it.

here is playground link
https://phpstan.org/r/9e26dfae-706f-4e3a-bcfe-8a5ba327e393

also there are psalm one (with some errors on psalms side)
https://psalm.dev/r/d1a036f1f4