Add more special cases in extarrange script.

[umeshSinghVerma]

RegEx is something you'll find much useful in your daily lives, so I'd highly recommend working on this issue

extarrange script arranges all the files in a given folder into a folder named by their extension. It can be used to group up the files under your Downloads folder for example.

There are special cases added in the script which restricts similar file types like tar based files ending with .tar.gz or .tgz to be same as .tar files and hence places them into folder of name tar instead. Do add more similar special cases by writing their regex.

Refer https://regex101.com/ & https://github.com/ziishaned/learn-regex/ for explaination and writing regex patterns.

You can always reach out for help here.

After updating script send a PR mentioning this issue by putting "#" in your PR (optionally also in the commit).