Add Kiosker integration documentation

[Claeysson]

Proposed change

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: Add Kiosker integration core#164543
• Link to parent pull request in the Brands repository: Add Kiosker branding brands#10115
• 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

Note

Copilot was unable to run its full agentic suite in this review.

Adds new Home Assistant integration documentation for the Kiosker integration, covering setup prerequisites, config flow fields, capabilities, and removal.

Changes:

• Added a new integration documentation page for Kiosker.
• Documented configuration fields for the config flow and device communication settings.
• Documented available sensors and standard removal steps.