Add Clickteam Fusion detection rule

Add a Detect It Easy rule (db/PE/game_engine_ClickteamFusion.3.sg) to identify Clickteam Fusion executables. The rule checks for the PE export function `zi32Support` and an overlay signature, sets the detected version to `2.X+`, and includes author metadata.

db/PE/game_engine_ClickteamFusion.3.sg

@@ -0,0 +1,18 @@
+// Detect It Easy: detection rule file
+
+// Author: DosX
+// E-Mail: collab@kay-software.ru
+// GitHub: https://github.com/DosX-dev
+// Telegram: @DosX_dev
+
+// https://www.clickteam.com/clickteam-fusion-2-5
+meta("game engine", "Clickteam Fusion");
+
+function detect() {
+    if (PE.isExportFunctionPresent("zi32Support") && PE.compareOverlay("'wwwwI' 87 'G'")) {
+        sVersion = "2.X+";
+        bDetected = true;
+    }
+
+    return result();
+}