Feature upgrade

Added the following new flags:

-toLC -> Renames all image files of filetype (PNG, JPEG/JPG, WEBP) to lowercase format.
quality<?> -> Set the quality percentage for image compression (default is 80). Has to be between 1 and 100 (best).
silent -> Hide all logs and information

The help flag can now be called with just -h (-help is still supported)

First functional release

• Support for file conversion from PNG/JPEG/JPG -> WEBP
• Image optimization (reduce file size)
• Automatically converts JPG -> JPEG (new naming format)