Feliz v3.0 Roadmap

[Freymaurer]

Current plan to update Feliz for JSX output

• update docs to use astro framework docosaurus and fable react components
• add docs for people who want to keep using non jsx syntax or a module for those html functions
• Supports F# nullness (available with Fable 5)

[MangelMaxime]

I added F# nullness and Feliz.CompilerPlugin check against Fable 5 to the list