Collecting feedback on #49340.

The API is still proposed: https://github.com/Microsoft/vscode/blob/e9d85075419ae270303eec08c94444146b18f7bc/src/vs/vscode.proposed.d.ts#L518

Sample usage: https://github.com/Microsoft/vscode-extension-samples/tree/master/quickinput-sample