See This link for the NexusMods mod page, which has a description, screenshots, and a download of the built mod.
This mod will no longer receive updates. This exact functionality was added to SDV in version 1.3.17, so the mod is no longer needed. The code probably won't compile without fixes.
This is a small mod that detects when the invite code menu is active, and then replaces the usual ConfirmationDialog close button with a button that instead extracts and saves the invite code to the user's clipboard. This works because the close button isn't used by the game.