Keyboard: Added Prime_L, Prime_O and Prime_M, moved Prime_R into primekb folder ...

Keyboard: Added Prime_L, Prime_O and Prime_M, moved Prime_R into primekb folder (#3907)

* Added template copies for prime_l
Added first set of files for prime_m and prime_o
Temporarily storing kbfirmware dumps in tmp

* Completed base for prime_m, prime_o and prime_l
Moved prime_r into primekb folder

* Added in QMK Configurator layout files for new PrimeKB keyboards
Slight modification to layout header files
Added my name to licensing

* Updated primekb readmes

* Removed temporary working files

* Updated default keymap for Prime_O

* Added link to Newbs Guide in prime_r readme