Add a shortcut for clipboard paste to the numpad

[noodlejetski]

I use the "long press comma to paste" shortcut quite a lot when using the alphanumeric keyboard, but it doesn't seem to be available when using the numpad. it would be especially useful when entering a 2FA code that's been copied from the authenticator app, as many apps and websites make the keyboard switch to numpad layout for that particular text field.