various enhancements

- add helper function declarations to iDescriptor.h
- remove unnessery mountDevImage
- single instance lock for devdiskimages (may be removed in future)
-  implement  safe_afc_read_directory to make sure client is long lived ( for now ony for  afc_read_directory needs to be wrapped)
- remove some cleanup code for testing (init_device.cpp)
- clean leave label for mount_dev_image.cpp

.vscode/c_cpp_properties.json

@@ -1,22 +1,22 @@
 {
-    "configurations": [
-        {
-            "name": "Linux",
-            "includePath": [
-                "${workspaceFolder}/**",
-                "/usr/include/qt/**",
-                "/usr/local/opt/qt/**",
-                "${workspaceFolder}/build/Desktop-Debug/iDescriptor_autogen/include",
-                "${workspaceFolder}/build/Desktop-Debug/src/lib/**",
-                "/usr/local/include/**",
-                "/usr/include/python3.13"
-            ],
-            "defines": [],
-            "compilerPath": "/usr/bin/gcc",
-            "cStandard": "c17",
-            "cppStandard": "gnu++17",
-            "intelliSenseMode": "linux-gcc-x64"
-        }
-    ],
-    "version": 4
-}
+  "configurations": [
+    {
+      "name": "Linux",
+      "includePath": [
+        "${workspaceFolder}/**",
+        "/usr/include/qt/**",
+        "/usr/local/opt/qt/**",
+        "${workspaceFolder}/build/Desktop-Debug/iDescriptor_autogen/include",
+        "${workspaceFolder}/build/Desktop-Debug/src/lib/**",
+        "/usr/local/include/**",
+        "/usr/include/qt6/**"
+      ],
+      "defines": [],
+      "compilerPath": "/usr/bin/gcc",
+      "cStandard": "c17",
+      "cppStandard": "gnu++17",
+      "intelliSenseMode": "linux-gcc-x64"
+    }
+  ],
+  "version": 4
+}