For that example I would open the document in Sublime Text, select all, and split selection into lines so that I have an independent caret on every line. Then I'd just type the quote at the beginning and end of each line - the home/end keys will put each caret at the beginning or end of its respective line.
Multiple cursors has been supported for quite some time now in VSCode, as well as related useful default editor shortcuts like jump cursor by word, beginning/end of line, etc, that are especially useful when moving around multiple cursors/selections simultaneously.
