Enumeration for the digital controller buttons. @note - L1/R1/L3/R3 only can bind using ::sceCtrlPeekBufferPositiveExt2 and ::sceCtrlReadBufferPositiveExt2 @note - Vita's L Trigger and R Trigger are mapped to L1 and R1 when using ::sceCtrlPeekBufferPositiveExt2 and ::sceCtrlReadBufferPositiveExt2