Create an enum for valid device rotations

[matejcik]

https://github.com/trezor/trezor-suite/issues/13360

this can also make our code slightly nicer in places

[TychoVrahe]

Some related thoughts:

• for unix, we introduced ORIENTATION_NSEW etc macros to tell unix display driver what roations should it allow, i think we should expand this to hw boards too and bind this enum to it somehow (see i.e. https://github.com/trezor/trezor-firmware/blob/main/core/embed/models/T3T1/boards/t3t1-unix.h)
• in apply_settings, we don't actually check whether the orientation passed is valid for the device, we show the dialog even if invalid (i.e. orientation east for T2B1) and store the setting into storage, the display does nothing but its clearly wrong. this should be fixed too