Explicitly configure identation settings for VSCode (#2450)

This adds explicit configuration to `.vscode/settings.json` so we
use two spaces for indentation, rather than relying on the user's
own settings or automatic detection.

.vscode/settings.json

@@ -1,11 +1,14 @@
 {
-    "files.exclude": {
-        "**/bin": true,
-        "**/obj": true,
-        "**/packaging": true,
-        "**/coverage-results": true
-    },
-    "files.trimTrailingWhitespace": true,
-    "files.trimFinalNewlines": true,
-    "files.insertFinalNewline": true
+  "files.exclude": {
+    "**/bin": true,
+    "**/obj": true,
+    "**/packaging": true,
+    "**/coverage-results": true
+  },
+  "files.trimTrailingWhitespace": true,
+  "files.trimFinalNewlines": true,
+  "files.insertFinalNewline": true,
+  "editor.detectIndentation": false,
+  "editor.tabSize": 2,
+  "editor.insertSpaces": true
 }