Whats Next? 0.17.0

- Added TANK ASSISTANT section to the left navigation.
- Added Midnight Season 2 Mythic+ dungeon and boss reference data for Patch 12.1.
- Added per-boss Enemy Forces % route targets (0-100), saved in SavedVariables.
- Added a separate native Blizzard-style Tank Assistant window.
- Added native Blizzard dropdown for selecting the current key.
- Floating window shows the selected dungeon, boss order and saved mob percentage targets.
- Tank Assistant uses UIParent inheritance, GameFont objects, InputBoxTemplate, UICheckButtonTemplate, UIPanelScrollFrameTemplate and WowStyle1DropdownTemplate.
- No custom font or UI scale system added.
