Check for invalid phpstan doc comments

[BackEndTea]

I've added this as part of the InvalidPhpDocTagValueRule, which is a level 2 rule.

Arguably this could also be its own rule, which could be implemented on level 0.

Fixes: phpstan/phpstan#3026

[ondrejmirtes]

Thank you! This should be a separate level 2 rule. I want to adhere to SRP, and checking for unknown tags is a completely separate concern than looking for parse errors in PHPDocs.

[BackEndTea]

Sure, i'll rework this into its own rule.

Why a level 2 rule though? I'd think this is like a configuration error, and should be a level 0 check.

[ondrejmirtes]

Level 0 and 1 do not read or rely on PHPDocs in any way.

[BackEndTea]

Ah that makes sense

[ondrejmirtes]

This is perfect, thank you! I'll change the wording of the error on master, but for now, I'm merging this :)

[BackEndTea]

Thanks @ondrejmirtes !