feat: expand cockpit integrations and support workflows

Add Phoenix remote desktop, action connector, documentation engine, and gamification support. Refactor support-case processing and search/action UI, and update installer assets and dependencies.

F4SD-Gamification/LevelEventArgs.cs

@@ -0,0 +1,10 @@
+namespace F4SD.Gamification
+{
+    public class LevelEventArgs
+    {
+        public int CurrentLevel { get; set; }
+        public string LevelTitle { get; set; }
+        public int CurrentXp { get; set; }
+        public int XpRequiredForLevelUp { get; set; }
+    }
+}