suggestion for example project for GDExtensions

Naming project project and creating a project directory named project that keeps part of the project is highly confusing, whenever text asks to put something in the project directory I am utterly lost. Calling the directory mygame would probably help a lot (note: English is my second language, could be that's part of the problem, still, it is not like a huge change and it will definitely remove at least some of the confusion).

Search the GDExtensions example project documentation for the project directory name and the surrounding instructions that refer to it. Rename the example directory to “mygame” and update all related wording consistently, then review the documentation to confirm readers can distinguish the example directory from their own project.

Written by the indexing model from the issue text.