Feature request: Plugins

[giovannefeitosa]

Hi, Coflux team, I really like Coflux, less than a week I'm already in love with it.

I would like to request the possibility to create plugins, so for example I could build plugins for:

• different kinds of preview (pydantic classes, html, pdfs, etc.)
• improve the components for inputs (create date ranges, switchers instead of selects for booleans, etc.)
• enhance workflow nodes with previews, loading states, etc.
• authentication, different databases, etc.

Thank you for creating this, very well architected! (also a discord channel would be cool)