Squeezebox: Doc for new alarm time sensor

[wollew]

Proposed change

Adds documentation for the player sensor that is added in #155788

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logos and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: provide Squeezebox player sensor for next alarm timestamp core#155788
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: fixes #

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

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[Copilot]

Pull Request Overview

This PR adds documentation for new entity types in two integrations: Velux and Squeezebox. The changes document support for a new Select entity in Velux for controlling cover velocity, and a new Next alarm sensor in Squeezebox for tracking player alarm times.

• Added Select platform support to Velux integration for velocity control
• Added Next alarm sensor documentation to Squeezebox integration

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
source/_integrations/velux.markdown	Added select platform to metadata and device types list with velocity control description
source/_integrations/squeezebox.markdown	Added Next alarm sensor documentation to the sensors section