add vscode Intellisense

.vscode/c_cpp_properties.json

@@ -0,0 +1,10 @@
+{
+  "configurations": [
+    {
+      "name": "JMinos",
+      "cppStandard": "c++20",
+      "compileCommands": ".vscode/compile_commands.json"
+    }
+  ],
+  "version": 4
+}