fix sticky aim

Refactor AIManager and CaptureManager for improved logging

Significantly modified `AIManager.cs` to remove unused variables, add nullable types, and refactor logging to a static `Log` method. Updated `LoadModelAsync` to return a `Task` and improved error handling. Moved detection calculation to a new `MathUtil` class, which also includes methods for distance calculations and bitmap conversions. Enhanced `CaptureManager.cs` to manage a new `directXBitmap` property and optimize frame capture logic. Updated UI files to include new dropdown options for image sizes, improving overall code readability, maintainability, and performance.

Author: TaylorIsBlue