chore: plugin generator

[adrianthedev]

Description

This PR will add the plugin generator to Avo

Still to do

• [ ] finish the component templates
• [ ] add the text field templates
• [ ] the app/avo/plugins directory is not autoloaded so Avo is not picking up the plugin
• [ ] docs

Branched from the refactor/plugin-rework branch so merge https://github.com/avo-hq/avo/pull/3259 first.

Checklist:

• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works

Screenshots & recording

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.