Feature: Save highlighted SQL query to file

There's no convenient way to save snippets of SQL queries to separate files. Whenever I save a highlighted SQL query, it ends up being the entire SQL query box. Since there's already an option to "Execute selected query" I suppose it shouldn't be too bad to have a Save Selected Query option too? Thanks!

Start by locating the existing “Execute selected query” action and the current save-query handling in the Postico codebase. The feature is done when a highlighted SQL selection can be saved to its own file instead of saving the entire query box.

Written by the indexing model from the issue text.