fix: BufferedImage <-> Mat conversion; refacfor: MouseOverText extraction

[StaticSweep]

• Fix BufferedImage <-> Mat conversion
  • Java2DFrameUtils caused the channel order to unpredictably change, breaking template matching, OCR and many other functionalities silently
  • Implementing custom convertors results in far greater template matching accuracy and better performance
• MouseOverText extraction
  • Using the shadow pixels diagonal to character pixels allows for dynamic filtering
  • This approach does not require input colours or thresholds as previously attempted
  • Reliability should be greatly improved