deactivated copilot for cpp files for uni coding exercises

systems/common/vscode.nix

@@ -111,6 +111,14 @@
         "\${workspaceFolder}/**"
       ];
       "C_Cpp.clang_format_fallbackStyle" = "Microsoft";
+
+      "github.copilot.enable" = {
+        "*" = true;
+        plaintext = false;
+        markdown = false;
+        scminput = false;
+        cpp = false;
+      };
     };
   };
 }