Add support for bold, italics and strikethrough formatting in comments

[absidue]

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Add support for bold, italics and strikethrough formatting in comments

Pull Request Type

• Feature Implementation

Related issue
closes #2404
yt-comment-scraper PR: FreeTubeApp/yt-comment-scraper#41

Description
The majority of the changes are in yt-comment-scraper, this PR purely adds support for the yt-comment-scraper changes.

This pull request adds support for bold, italics and strikethrough formatting in comments.

Screenshots (if appropriate)
before:

after:

Testing (for code that is not small enough to be easily understandable)

1. Install the yt-comment-scraper PR: yarn add "@freetube/yt-comment-scraper@git+https://github.com/absidue/yt-comment-scraper#parse-formatting"
2. The comments under this video are a good place to test this PR (taken from this article)

https://www.youtube.com/watch?v=OqiXFXlYFi8

Desktop (please complete the following information):

• OS: Windows
• OS Version: 10
• FreeTube version: 0.17.1

[PikachuEXE]

Tested locally but test instruction incorrect
Wrong: yarn add "yt-comment-scraper@git+https://github.com/absidue/yt-comment-scraper#parse-formatting"
Right: yarn add "@freetube/yt-comment-scraper@git+https://github.com/absidue/yt-comment-scraper#parse-formatting"

[absidue]

Oops, sorry for that.

Edit: fixed the instructions now

[ChunkyProgrammer]

I'm guessing this isn't supported by invidious

[absidue]

@ChunkyProgrammer So we can do it for Invidious but it will only be for bold and italicised text as they don't seem to be parsing strikethrough on their end. Currently we use content, the problem is that Invidious also returns links in their contentHtml property so we would need much more complicated regex to filter that out.

content: This text will be bold and this will be italicized and this will will be crossed out
contentHtml: <b>This text will be bold</b> and <i>this will be italicized</i> and this will will be crossed out

Preview:
This text will be bold and this will be italicized and this will will be crossed out

Local API for comparison:

<b>This text will be bold</b> and <i>this will be italicized</i> and <s>this will will be crossed out</s>

Preview:
This text will be bold and this will be italicized and this will will be crossed out