[segmentation] Add drishtigs1 database

pyproject.toml

...dnet/libs/segmentation/config/data/drishtigs1/__init__.py

...et/libs/segmentation/config/data/drishtigs1/datamodule.py

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_001.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_003.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_005.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_006.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_007.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_009.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_011.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_013.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_014.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_019.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_020.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_021.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_023.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_025.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_027.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_028.png

...gs1/masks/Drishti-GS1_files/Test/Images/drishtiGS_029.png