Add support for channel's Courses tab

[ChunkyProgrammer]

Add support for channel's Courses tab

Pull Request Type

• Bugfix - fixes some issues with podcasts and releases as well
• Feature Implementation - add support for channel's Courses tab

Related issue

iv-org/invidious#5144

Dependent on:
LuanRT/YouTube.js#883
iv-org/invidious#5158

Description

This PR adds support for the courses tab on the channel page for both local api and Invidious API

Screenshots

Testing

test 1

• enter this url https://www.youtube.com/@InfinityLearn_NEET/courses
• be navigated to courses tab

test 2

• enter this url https://www.youtube.com/@InfinityLearn_NEET/
• switch to courses tab

test 3

• hide courses tab in distraction free settings
• go to https://www.youtube.com/@InfinityLearn_NEET
• don't see courses tab

Desktop

• OS: Fedora Linux
• OS Version: 41
• FreeTube version: latest nightly

[absidue]

As a YouTube.js update with the required changes was released and is being used on the development branch, what would you like to do with this pull request? Wait until the changes on the Invidious side are merged or proceed with a local API implementation first and follow up with an Invidious implementation once the relevant changes have landed on their side?