Badge Flasher

Initial release based on halsey1006's Uncrowned Insignia, but essentially rewritten from the ground up.

Improvements

These changes should drastically minimize resource usage and the potential for issues with any other targets:

• Function immediately exits if mod key is used
• Function immediately exits if not in Legion Dalaran
• Function immediately exits if target is not one of the three gatekeepers

These changes remove the need for translations and simplify the detection:

• Gatekeeper detection is based on ID rather than name
• Dialog selection is based on the "gossip" type

No updates should be needed unless the NPCs' available dialog options change. As long as there is only one "gossip" option available, it should automatically be selected.