Modern FPS Feedback

- The active rendering backend has been migrated from IMGUI to NGUI.
- OnGUI is now used only during initial NGUI font acquisition, while hit markers, kill and assist feedback, text, digits, skulls, backgrounds, and borders are rendered through NGUI.
- Hit-marker rendering has been rebuilt with antialiased vector graphics.
- The normal-hit, headshot, and kill-marker designs have been revised.
- Ranged hit markers follow the spacing, length, and thickness of the game's dynamic crosshair, while melee hit markers use their own directional layout.
- Each shadow uses the same geometry as its main element and is drawn once before the main element.
- The shadow color is a 50:50 mix of the main element color and black.
- The shadow opacity is 45 percent of the final opacity of the main element.
- The shadow offset follows the exact rendering scale of the main element.
- Individual visibility controls have been added for skulls, enemy names, total damage, kill results, headshot-kill results, assist results, and hit markers.
- Disabled elements are not rendered and no longer generate unnecessary display events.
- Position and scale controls have been added for the complete kill-feedback group.
- The X position, Y position, and overall scale can be adjusted from the in-game settings.
- Positions are stored as coordinates relative to screen width and height, while size is stored as a scale relative to the reference resolution.
- A separate overall size control has been added for hit markers without removing their dynamic crosshair tracking.
- Kill-feedback lifetime management has been replaced with a configurable timeout based on the elapsed time since the most recent kill.
- The timeout can be enabled or disabled, configured in seconds, and applied either at all times or only when the visible-entry limit is exceeded.
- Multi-kill stack handling has been rebuilt.
- Up to five entries are shown on screen while additional records remain queued internally and slide into view in o…