"Convert" .m3u8 HLS segmented streams to direct media streams by processing them as one stream

[sonroyaalmerol]

Context

• .m3u8 HLS streams has been a pain to deal with due to how different it is from your usual direct video streaming. This should somehow try to eliminate that difference and let the proxy handle the segments and only letting the client see one complete stream.
• This requires Implement shared buffer for multiple clients per stream ID #220 to be merged.

Choices

• This pretty much uses Implement shared buffer for multiple clients per stream ID #220's buffer system but simply uses the segments provided by the .m3u8 text file to serve instead of chopping them up manually.

Test instructions

Checklist before requesting a review

• I have performed a self-review of my code
• I've added documentation about this change to the README.
• I've not introduced breaking changes.

[github-actions]

The Docker image for this pull request has been built and pushed to GHCR.

Image URL: ghcr.io/sonroyaalmerol/m3u-stream-merger-proxy:pr-224