[Feature] Support for undocumented kicad_sch attribute `[Symbol('netclass_flag')

[N0cynym]

Describe the bug
I'm trying to use the new feature netclass.
KiBot seems not to know about them.

To Reproduce
Add Netclass.

Environment (please complete the following information):
Where are you running KiBot:

• In a CI/CD workflow GitLab
• Using docker image ghcr.io/inti-cmnb/kicad7_auto:dev

Additional context

ERROR:Unknown kicad_sch attribute `[Symbol('netclass_flag'), '', [Symbol('length'), 2.54], [Symbol('shape'), Symbol('rectangle')], [Symbol('at'), 222.25, 41.91, 0], [Symbol('effects'), [Symbol('font'), [Symbol('size'), 1.27, 1.27]], [Symbol('justify'), Symbol('left'), Symbol('bottom')]], [Symbol('uuid'), Symbol('356c46fb-1c9f-46ea-82f7-5ade23c8fdc8')], [Symbol('property'), 'Netclass', 'NetCl_power', [Symbol('at'), 222.25, 38.1, 0], [Symbol('effects'), [Symbol('font'), [Symbol('size'), 0.635, 0.635], Symbol('italic')]]]]` (kibot - kiplot.py:270)

[set-soft]

Hi @N0cynym !

KiCad schematic format documentation doesn't mention anything about netclasses.

Moreover, netclasses are stored in the project.

So I think this is some additional feature, I need an example project using it.

[N0cynym]

This should fail if you anything with kibot.

Test-418.zip

[set-soft]

This should work now. They are very similar to other labels, just adds a length.

I didn't see these flags. Note that they aren't mandatory, you can tag net without using these flags.

[N0cynym]

Works, thanks you!