Support comments in UI editors (settings and keyboard shortcuts)

I prefer using the UI editor for both settings and keyboard shortcuts. However, I often find myself automatically going into the JSON files because they're packed with comments — for both modified and unmodified settings/keyboard rules (example shown below). ### Feature Request - Support ability to add comments to the UI editors, possibly with an icon next to the setting/keyboard rule (if it has a comment), allowing the comment to be viewed by hovering over the icon. - Add additional tags that would allow you to further filter the results (e.g. `@commented`, `@modified @commented`, `@unmodified @commented`). ### Note This would also solve a bug where comments in the JSON file are removed (without any indication) when making changes in the UI editor. See #75599. ### Example Here's an example `settings.json` file that has comments for both modified and unmodified settings: ```jsonc { // Disabling validation prevents errors on syntax constructs that aren't supported by the language // service (e.g. proposed features such as the pipeline operator). It also prevents duplicate // linting errors (from both ts and eslint). However, it also prevents the editor.showUnused // (fading of unused variables) option from working. // https://github.com/Microsoft/TypeScript/issues/29293) // https://github.com/Microsoft/TypeScript/issues/13408 "javascript.validate.enable": false, "typescript.validate.enable": false, // Good for disabling annoying tooltips, but nice for eslint error details. // Waiting for ability to customize tooltips or place the tooltips at top/bottom. // https://github.com/Microsoft/vscode/issues/65996 // "editor.hover.enabled": false, } ```