Previously we used uint32_t for bitmasks but having a custom type means
we're less likely to confuse an int value with a mask type.
Two types of API here, the u32 api for passing in masks and a bit API
for passing in single bits.
Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1218>
libinput-util.h is getting a bit of a catchall bucket and it includes things
like libinput-private.h which in turn includes libwacom. This makes
libinput-util.h less useful for bits that only need e.g. the string processing
utilities.
So let's split them all up in to separate files, to be used as-needed.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
