Feat task 1602 new detector interface

[serengil]

Tickets

#1021

What has been done

With this PR,

• Detector interface is changed. Now, all detectors are returning facial area coordinates, eye coordinates and confidence score. They are not responsible for extracting face, alignment or expanding facial area.
• Extracting face, alignment and expanding facial area are now done in DetectorWrapper which is the parent object of those detectors.
• Besides, we are now align first and extract facial area second not to have many black pixels.

How to test

make lint && make test

[serengil]

Comparative results are shown in the following illustration