feat(extension): adding Happy Hare MMU installer

[gamkiller77]

Is your feature request related to a problem? Please describe

No

Describe the solution you'd like

Add Happy Hare firmware install to kiauh https://github.com/moggieuk/Happy-Hare This is support ERCF v1.1 and v2 with klipper.

Describe alternatives you've considered

Manual install is fine, but I love Kiauh, so something like this seemed like the next step.

Additional information

https://github.com/moggieuk/Happy-Hare

[Tannoo]

Has this been dropped?

[dw-0]

What haven't even picked up, cannot be dropped :)