Add support for TikTok comments

[upintheairsheep]

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Before submitting a pull request make sure you have:

• Searched the bugtracker for similar pull requests
• Read adding new extractor tutorial
• Read youtube-dl coding conventions and adjusted the code to meet them
• Covered the code with tests (note that PRs without tests will be REJECTED)
• Checked the code with flake8

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• I am the original author of this code and I am willing to release it under Unlicense
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What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

Uses the V2 API to extract comments from TikTok, which can then be used for archival, fed to an AI or randomizer, printed out on a custom toilet bowl, or whatever else you want with it

[upintheairsheep]

Sorry, I am currently learning Python, so may you please look at the code, and fix possible issues with it? Just to note, I have been banned from yt-dlp for issue spamming in the past, which is why I can't submit it to yt-dlp, and I submitted it here instead.