Fix minor issues and create a .clangd config for different builddirs

.vscode/c_cpp_properties.json

@@ -5,11 +5,12 @@
       "compilerPath": "/usr/bin/clang",
       "cStandard": "c11",
       "cppStandard": "c++20",
-      "compileCommands": "${workspaceFolder}/builddir/compile_commands.json",
       "browse": {
-        "path": ["${workspaceFolder}"]
+        "path": [
+          "${workspaceFolder}"
+        ]
       }
     }
   ],
   "version": 4
-}
+}

.vscode/settings.json

@@ -1,7 +1,6 @@
 {
   "clangd.arguments": [
     "-background-index",
-    "-compile-commands-dir=builddir/"
   ],
   "editor.formatOnType": false,
   "editor.formatOnSave": true,