Redesign enhancement and support non-ascii urls

[sinaqahremani]

In this fork, I tried to enhance the readability and structure of the project. Moreover, to enhance using experience I have provided a requirements.txt file and a CLI to run the code easily. Also, I have provided the ability to crawl non-ascii URLs, so that sites from all languages can be crawled.

[wiejakp]

thanks, i'll have look into this soon. 👍🏼

[sinaqahremani]

looking nice from first look over

thank you. In case you have any comments do not hesitate to post them here. I will update the code.