Issue: Shadowlands introduces new map waypoints and provides an API for addons to interact with them.

Details:

• There is a user-selectable waypoint by ctrl-clicking on the map.
• Shift-clicking the waypoint adds it to a chat message to share using a new waypoint hyperlink

Planned changes to CT_MapMod:

• Change the editing keybind to make room for the new UI
• Respond to ctrl-click on a MapMod pin, placing the waypoint right atop its location
• Create hyperlinks to share CT_MapMod pin locations in chat messages
• When creating notes over a waypoint, place it exactly on the waypoint's coordinates