Add adguardhome to the umbrel app store

[BirbEXE]

Hey all.

I'm here to request that an umbrel integration be made for adguardhome.

Umbrel is a server "OS" if you will, with a built in app store. The integration would allow a one-click install for adguardhome.

Pi-Hole already has an integration on umbrel, but I still prefer adguardhome and would like to be able to use it on umbrel.

here's the instructions for umbrel's super simple app framework

https://github.com/getumbrel/umbrel-apps#readme