Added incus-specific patches to fix branding and API

Used sed command to replace various 'LXD' branding with 'Incus' branding, and 

1. Replaced all occurrences of "LXD" with "Incus"
2. Replaced all occurrences of "devlxd" with "guestapi"
3. Replaced "dev/lxd" with "dev/incus"
4. Replaced "lxd_" with "incus_"
5. Replaced occurrences of ""lxd"" with ""incus""

Apart from the branding, this fixes incompatible naming in the web UI.

These are taken directly from the patches used by Incus maintainer Stéphane Grober, in his repository zabbly/incus

pkgs/by-name/in/incus/ui.nix

@@ -22,5 +22,11 @@ lxd.ui.overrideAttrs(prev: rec {
       echo "applying patch $p"
       git apply -p1 "$p"
     done
+    sed -i "s/LXD/Incus/g" src/*/*.ts* src/*/*/*.ts* src/*/*/*/*.ts*
+    sed -i "s/devlxd/guestapi/g" src/*/*.ts* src/*/*/*.ts* src/*/*/*/*.ts*
+    sed -i "s/dev\/lxd/dev\/incus/g" src/*/*.ts* src/*/*/*.ts* src/*/*/*/*.ts*
+    sed -i "s/lxd_/incus_/g" src/*/*.ts* src/*/*/*.ts* src/*/*/*/*.ts*
+    sed -i "s/\"lxd\"/\"incus\"/g" src/*/*.ts* src/*/*/*.ts* src/*/*/*/*.ts*
+
   '';
 })