Update Museck to v0.1.0

[Nezreka]

Update MUSECK to 0.1.0

This is a UI overhaul and bug fix release for Museck.

The panel and pages were rebuilt on a shared set of primitives so the layout is
consistent throughout, and playback controls are now fully reachable with a
controller. Fixed an invisible focus highlight and the inability to get back to
the panel from a page.

On the playback side, the biggest fix was ffplay inheriting Decky's bundled
libraries — an OpenSSL version mismatch killed it on startup, so every track
appeared to play for zero seconds. It now runs with a clean environment and
surfaces failures instead of silently skipping. Also fixed a bug that caused
continuous skipping to the next track, and several smaller playback, config,
and Plex smart-playlist issues.

New in this release: genre browsing with shuffle, playback reporting to Plex so
sessions and listening history record properly, the option to confine a Plex
server to a single music library, and readable names for tracks Plex indexed
but never matched. Large playlists are now paged instead of requested whole,
which was slow on big libraries.

Also updates the plugin logo and author display name.

Task Checklist

Developer

• I am the original author or an authorized maintainer of this plugin.
• I have abided by the licenses of the libraries I am utilizing, including attaching license notices where appropriate.
• Generative AI was NOT used to write a majority of the code I am submitting.

Plugin

• I have verified that my plugin works properly on the Stable and Beta update channels of SteamOS.
• I have verified my plugin is unique or provides more/alternative functionality to a plugin already on the store.

Backend

• No: I am using a custom backend other than Python.
• No: I am using a tool or software from a 3rd party FOSS project that does not have it's dependencies statically linked.
• No: I am using a custom binary that has all of it's dependencies statically linked.

Community

• I have tested and left feedback on two other pull requests for new or updating plugins.
• I have commented links to my testing report in this PR.

Testing

• Tested by a third party on SteamOS Stable or Beta update channel.

[github-actions]

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