Disable formatting on save for Dart and HTML files (#122048)

* Remove "format on save" and "format on type" from directory settings
* Also turn off HTML formatting

.vscode/settings.json

@@ -0,0 +1,11 @@
+// VSCode workspace settings that are shared among all users of this project.
+// This only affects subdirectories of this project.
+{
+    // VSCode formats files on save by default. Since Flutter source code is
+    // hand-formatted, the default settings are changed to prevent inadvertent
+    // reformatting of code.
+    "editor.formatOnSave": false,
+    "editor.formatOnType": false,
+
+    "html.format.enable": false
+}