New Crawler, Legacy file name, and improved file detection.

I would like to thank the anon who supported me in my buy me a coffee page

Changelog:

• Coomer/Kemono Crawlers scrape time take 10-20 seconds
• improved http response.
• Replaced the old custom http stream to dio.downloadUri() function

I would like to thank this community for their support and patience.

Fixed issues:

• #25
• #24

Features:

• #21

Known Issues:

• ScrollerController won't auto scroll down during crawl.