Add VSCode debug launch configuration for main scene

misc/vscode/launch.json

@@ -4,6 +4,33 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
+        {
+            "name": "Main (gdb) Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "/run/current-system/sw/bin/godot",
+            "args": [
+                "${workspaceFolder}/examples/menu/menu.tscn",
+            ],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true,
+                },
+                {
+                    "description":  "Set Disassembly Flavor to Intel",
+                    "text": "-gdb-set disassembly-flavor intel",
+                    "ignoreFailures": true,
+                },
+            ],
+        },
+
         {
             "name": "Editor (gdb) Launch",
             "type": "cppdbg",