Add more Numpad keys like NumpadEnter and NumpadComma

[MrSteppy]

Add the following keys:

• NumpadEnter
• NumpadComma
• NumpadPlus
• NumpadMinus
• NumpadMultiply
• NumpadDivide

Partial duplicate of #91

[D01B0EB]

I had test on CachyOS (Arch) linux (by evtest tool) 2 keyboards with identical result:
Select the device event number [0-21]: 4
Event code 55 (KEY_KPASTERISK) = 0x37
Event code 71 (KEY_KP7) = 0x47
Event code 72 (KEY_KP8) = 0x48
Event code 73 (KEY_KP9) = 0x49
Event code 74 (KEY_KPMINUS) = 0x4A
Event code 75 (KEY_KP4) = 0x4B
Event code 76 (KEY_KP5) = 0x4C
Event code 77 (KEY_KP6) = 0x4D
Event code 78 (KEY_KPPLUS) = 0x4E
Event code 79 (KEY_KP1) = 0x4F
Event code 80 (KEY_KP2) = 0x50
Event code 81 (KEY_KP3) = 0x51
Event code 82 (KEY_KP0) = 0x52
Event code 83 (KEY_KPDOT) = 0x53
Event code 95 (KEY_KPJPCOMMA) = 0x5F
Event code 96 (KEY_KPENTER) = 0x60
Event code 98 (KEY_KPSLASH) = 0x62
Event code 117 (KEY_KPEQUAL) = 0x75
Event code 121 (KEY_KPCOMMA) = 0x79