add BDSP blink detection

[theastrogoth]

Adds a few things related to blink detection:

• a way to set set the detection box and choose appropriate image templates depending on the scene (at Lake Verity, in the player character's bedroom, etc)
• a blink detector
  • converts template and capture to grayscale to mitigate in-game time of day differences or capture card hue differences
  • matches the template to the capture by searching across the detection box, which is big enough to allow for idle animations, and calculating cross-correlation
  • stores scores and timestamps in a vector to be used later to decide when blinks occurred (blinking increases the difference of the capture from the template for a few frames)
• a UI option for selecting one of the 8 character models (for template selection)

[Mysticial]

Can you leave a comment here explaining the math here? I see a variance calculation, though I can't tell how similar it is to the image_stats() function or if it duplicates it entirely.

[theastrogoth]

I originally avoided image_stats to work in grayscale rather than RGB, but just using OpenCV's matchTemplate() instead of basically reimplementing it is probably the best option

[Mysticial]

I already merged the Packages PR for this, but can be change the naming convention to:
LakeTemplates/Model-X.png? (title case)