Add support for 9.0.0

What do you want to achieve?

Add support for lvgl 9.0.0

Do you see alternative options and workaround to achieve it?

Mention some use cases

rgb 24bit

Hi, SLS v1 will not support LVGL v9. This support will be available in SLS v2, which is expected to be released early next year.

When will v2 come out?

There were some changes in the roadmap, the next version of SquareLine Studio will support LVGL9, and gets released very soon.