Update to lvgl 9.2.0

[thiccaxe]

9.2.0 had some non-trivial project structure changes, so this needed a non-trivial amount of manual effort after running the script from #45. It compiles, but "LV_USE_FS_STDIO" was disabled because it needed libent.h which arm-none-eabi-gcc didn't support. This will likely break 99% of average pros proejcts that use lvgl, mainly because many function/type names were expanded, eg. create_btn -> create_button, lv_scr_act -> lv_screen_active.

Next step is to test on live hardware.

[thiccaxe]

If kernel and lvgl can be separated this might solve the second issue

[thiccaxe]

https://github.com/purduesigbots/liblvgl/tree/update/9.2.0 contains working code for lvgl 9.2.0, updated pros, and the new versions of libc and libm