DevEnv: Add C++ and Lua recommended extensions for VSCode

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    "recommendations": [
+        "ms-vscode.cpptools",
+        "sumneko.lua",
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "streetsidesoftware.code-spell-checker",
+        "chiehyu.vscode-astyle"
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "cSpell.language": "en-GB",
+    "astyle.astylerc": "${workspaceFolder}/Tools/CodeStyle/astylerc"
+}