Implement autoplay using YouTube mix

[kitsuvm]

No description provided.

[kitsuvm]

Hydrogen is repeating the songs like a lot, my suggestion is to increase the mix index until the music can't be found on the queue.

[Copilot]

Pull Request Overview

This PR implements an autoplay feature that automatically plays the next track from a YouTube mix when the playback queue is exhausted. Key changes include the addition of a new LoopMode variant "Autoplay" in both the player and command modules, new functions in PlayerManager for autoplay handling and YouTube ID resolution, and updates to i18n files and configurations to support the new feature.

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
hydrolink/src/cluster.rs	Added a getter for user_id.
hydrogen/src/music/player.rs	Updated LoopMode enum and track structure to include autoplay and YouTube identifiers.
hydrogen/src/music/mod.rs	Added new autoplay logic and helper functions to fetch YouTube tracks.
hydrogen/src/main.rs	Adjusted PlayerManager initialization to pass user id.
Various (i18n, commands, TODO, README, CHANGELOG)	Updated localization, command options, documentation, and changelog to integrate autoplay mode.

Comments suppressed due to low confidence (1)

hydrogen/src/music/player.rs:928

• Consider adding parentheses to clarify operator precedence. If the intention is to compute ((player.current_track + 1) % player.queue.len()), the expression should be updated accordingly to ensure correct wrap-around behavior.

LoopMode::All => (player.current_track + 1 % player.queue.len(), false, true),