Add ReadWritePropertiesExtension for Gedmo annotations/attributes

[acrobat]

Gedmo annotations (attributes) are used by gedmo listeners to automatically write data to properties and some of the properties are only used by gedmo internally. This ReadWritePropertiesExtension solves the unused property errors for these cases.

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  Line   Example.php
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  22     Property App\Entity\Example::$locale is unused.
         💡 See: https://phpstan.org/developing-extensions/always-read-written-properties
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Fixes #231
Related to phpstan/phpstan#7758

[acrobat]

The failing php 8.2 checks don't seem to be related to my change

[ondrejmirtes]

One more idea - if the class isn't an entity, the extension should return false even if the annotations are present. Please implement this with a test.

Please use ObjectMetadataResolver::isTransient() for this.

[acrobat]

@ondrejmirtes I've implemented the requested changes, thanks for the suggestions!

[acrobat]

@ondrejmirtes are there any other changes needed here?

[ondrejmirtes]

I like this, thank you :)