Working with APIs : Added new assignment

[kichuu]

Because

It would be helpful for people who understand better when concept is explained in a video.

This PR

Added a video on Fetch API in assignments

Issue

Additional Information

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide

[wise-king-sullyman]

Thank you for taking the time to make this PR.

Does this video provide new information, or just repeat previously covered information in a different format?

[kichuu]

Thank you for taking the time to make this PR.

Does this video provide new information, or just repeat previously covered information in a different format?

I'd say yes and no. Almost 70% of info in the video is covered in the current curriculum.. I personally think a bit more info on the topic would be good and very helpful for visual learners.