feat: add different rustdesks for configs

hosts/nb/modules/desktop/rustdesk-epicenter.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+
+let
+  wrapperScript = pkgs.writeShellScriptBin "rustdesk-wrapper" ''
+    CONFIG_FILE="$HOME/.config/rustdesk/RustDesk2.toml"
+    CONFIG_DIR="$(dirname "$CONFIG_FILE")"
+
+    if [ ! -f "$CONFIG_FILE" ]; then
+        ${pkgs.rustdesk-flutter}/bin/rustdesk &
+        RUSTDESK_PID=$!
+        sleep 3
+        kill $RUSTDESK_PID 2>/dev/null || true
+        sleep 1
+    fi
+
+    if [ -f "$CONFIG_FILE" ]; then
+        sed -i "s|^rendezvous_server = .*|rendezvous_server = 'tools.epicenter.works:21116'|" "$CONFIG_FILE"
+        sed -i "s|^custom-rendezvous-server = .*|custom-rendezvous-server = 'tools.epicenter.works'|" "$CONFIG_FILE"
+        sed -i "/^key\s*=.*/d" "$CONFIG_FILE"
+    fi
+
+    # Launch RustDesk
+    exec ${pkgs.rustdesk-flutter}/bin/rustdesk "$@"
+  '';
+
+  rustdeskEpicenterDesktopItem = pkgs.makeDesktopItem {
+    name = "rustdesk-epicenter";
+    desktopName = "RustDesk Epicenter";
+    exec = "${wrapperScript}/bin/rustdesk-wrapper";
+    icon = "rustdesk";  # Using the standard rustdesk icon
+    categories = [ "Network" "RemoteAccess" ];
+    comment = "Remote desktop software configured for Epicenter";
+  };
+in {
+  environment.systemPackages = [
+    rustdeskEpicenterDesktopItem
+  ];
+}