[Chore] Rename all stray arguments in endpoints as cat

[pieroit]

In plugins hook, tools and forms the StrayCat instance is called cat, while in core and custom endpoints it is named stray.
This brought confusion in devx and avoidable punctualizations in the docs.

Let's rename all stray references as simply cat, keeping StrayCat as a class. There should be no conflict with the main application package (which is also called cat) because it is never imported directly.

In case interested in contribution, please comment to get the issue assigned

[MihirKohli]

Please assign me this issue i will work on this.

[MihirKohli]

Should i make these changes across all the files in core?

[pieroit]

Should i make these changes across all the files in core?

Only endpoints for now!
So cat/routes folder

Assigning to you thanks 🙏

[MihirKohli]

raised pull request for the same @pieroit
#1031