unifi7: add package

https://community.ui.com/releases/UniFi-Network-Application-7-0-20/3e4a4099-c063-42f6-8e21-5fb2c99fcea9

Since that's a release candidate, unifiLTS remains unchanged.

nixos/tests/unifi.nix

@@ -12,7 +12,7 @@ let
   makeAppTest = unifi: makeTest {
     name = "unifi-controller-${unifi.version}";
     meta = with pkgs.lib.maintainers; {
-      maintainers = [ zhaofengli ];
+      maintainers = [ patryk27 zhaofengli ];
     };
 
     nodes.server = {
@@ -32,4 +32,5 @@ in with pkgs; {
   unifiLTS = makeAppTest unifiLTS;
   unifi5 = makeAppTest unifi5;
   unifi6 = makeAppTest unifi6;
+  unifi7 = makeAppTest unifi7;
 }

pkgs/servers/unifi/default.nix

@@ -63,4 +63,9 @@ in rec {
     version = "6.5.55";
     sha256 = "sha256-NUGRO+f6JzWvYPwiitZsgp+LQwnGSncnost03mgNVxA=";
   };
+
+  unifi7 = generic {
+    version = "7.0.20-894288bd9b";
+    sha256 = "sha256-lDSU4D159svqkv+e61v/RWIyw0KOrF8X0nNpo9eQe50=";
+  };
 }

pkgs/top-level/all-packages.nix

@@ -22113,7 +22113,9 @@ with pkgs;
   inherit (callPackages ../servers/unifi { })
     unifiLTS
     unifi5
-    unifi6;
+    unifi6
+    unifi7;
+
   unifi = unifi6;
 
   unifi-video = callPackage ../servers/unifi-video { };