Add VSCode configuration files for debugging and building with CMake; refactor main.cpp to clean up includes

.vscode/tasks.json

@@ -1,17 +1,24 @@
 {
-  "version": "2.0.0",
-  "tasks": [
-    {
-      "label": "CMake: Configure",
-      "type": "shell",
-      "command": "cmake -S . -B build -DCMAKE_EXPORT_COMPILE_COMMANDS=ON",
-      "problemMatcher": []
-    },
-    {
-      "label": "CMake: Build",
-      "type": "shell",
-      "command": "cmake --build build -- -j",
-      "problemMatcher": []
-    }
-  ]
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "CMake: build",
+            "type": "shell",
+            "command": "/usr/bin/cmake",
+            "args": [
+                "--build",
+                "${workspaceFolder}/build",
+                "--config",
+                "Debug",
+                "--target",
+                "${command:cmake.buildTargetName}" 
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "problemMatcher": "$gcc",
+            "detail": "Builds the target currently selected in the CMake status bar"
+        }
+    ]
 }