Basic downloader

In this release user is provided with the following functionalities:

• Download a file from a downloadable URL
• Customise download location and name
• Ability to download a file in parallel

What's Changed

• Created basic working download manager by @prithvitewatia in #1
• resolved #2 example image url by @prithvitewatia in #3

New Contributors

• @prithvitewatia made their first contribution in #1

Full Changelog: https://github.com/prithvitewatia/DownloadManager/commits/v1.0.0.0