feat: image optimization script

[h-elatina]

• Created a script for square center-cropping + conversion to .webp + resizing to 800x800px using the python3 pillow package.
• Files to be converted are to be added to the pre_crop directory (accepts .jpg, .jpeg, .png, .bmp, .webp file formats).
• Cropped files will be found in post_crop directory.
• Optimized cropped files will be found in post_opt directory.
• Fair Note: This PR does not include Pillow, users will have to install Pillow locally before running the script.