Auto assignment of attrs if no load function

[gsxdsm]

If there is no load method, attributes specified on the component tag could be automatically assigned to public attributes on the python side. Thoughts?

[nerdoc]

Sure. This would even simplify coding more to have load() optional. I would avoid overriding the load method, as users would then need to call super().load(...) at every class.
Insteady, I introduced a _pre_load() method (to be overridden for such things) and played a bit with it, but it was not well thought, and I removed it again.

Maybe the _call_load() would do also, to put this logic in.
If you want to see a call graph of what happens in Tetra, I created one in Figma

It should definitely be in a method that is called like load(), as these attrs should not be saved in states.

[gsxdsm]

Awesome. Adding this to my to-do list as well after form files.