Migrate public APIs containing typos

[stefan6419846]

We currently have some public APIs with typos which should be migrated accordingly:

• pypdf.constants.Ressources to pydf.constants.Resources
• pypdf.generic._data_structures.Destination.childs to pypdf.generic._data_structures.Destination.children (already has a TODO)

[pubpub-zz]

a

• pypdf.constants.Ressources to pydf.constants.Resources

• pypdf.generic._data_structures.Destination.childs to pypdf.generic._data_structures.Destination.children (already has a TODO)

I doubt many people use this in there own code : I propose to create an alias and use the depreciating process

[stefan6419846]

While there might not be many users, we should still use our deprecation process while it makes sense (although this might be a bit trickier for the Ressources case as these are just constants and this class is never being instantiated where we might have to work with something like django.utils.functional.classproperty).