mods_to_string(
mods) ->combination
Convert a modifier bitmask to a human-readable string
Maps a KKBP modifier bitmask to a "+" separated string of modifier
names. Bit values: SHIFT=1, ALT=2, CTRL=4, SUPER=8, HYPER=16,
META=32, CAPS_LOCK=64, NUM_LOCK=128.
Example: mods_to_string(5) → "SHIFT+CTRL"