testing/qmk: new aport

qmk_cli is like the "IDE" for qmk_firmware. (It used to be you could build qmk firmware with just the makefile and the dependencies, but now, this CLI is needed, and manages stuff related to that project).

I have tested this by compiling firmware for an rp2040-based keyboard.

Several of the dependencies are also in the testing repo, so when I move this into community, these packages will have to move also:

• py3-dotty-dict
• py3-halo
• py3-log-symbols
• py3-milc
• py3-spinners