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-ActionConnector/Payloads/PayloadBase.cs

@@ -0,0 +1,9 @@
+using F4SD.ActionConnector.Enumerations;
+
+namespace F4SD.ActionConnector.Payloads
+{
+    public abstract class PayloadBase
+    {
+        public abstract TriggerEvent Event { get; }
+    }
+}