Hide HTTP profile and ICY metadata config entries for Samsung WAM

[Oliver-Stevens]

What does this implement/fix?

Hides the HTTP profile config entry (WAM requires Profile 3 for URL streaming; other profiles break playback) and ICY metadata entry (not applicable to WAM hardware).
Also updates the provider name to "Samsung WAM" and fixes the documentation URL (samsung_wam → samsung-wam).

Types of changes

• Bugfix (non-breaking change which fixes an issue) — bugfix
• New feature (non-breaking change which adds functionality) — new-feature
• Enhancement to an existing feature — enhancement
• New music/player/metadata/plugin provider — new-provider
• Breaking change (fix or feature that would cause existing functionality to not work as expected) — breaking-change
• Refactor (no behaviour change) — refactor
• Documentation only — documentation
• Maintenance / chore — maintenance
• CI / workflow change — ci
• Dependencies bump — dependencies

Checklist

• The code change is tested and works locally.
• pre-commit run --all-files passes.
• pytest passes, and tests have been added/updated under tests/ where applicable.
• For changes to shared models, the companion PR in music-assistant/models is linked.
• For changes affecting the UI, the companion PR in music-assistant/frontend is linked.
• I have read and complied with the project's AI Policy for any AI-assisted contributions.

[github-actions]

🔒 Dependency Security Report

✅ No dependency changes detected in this PR.

[OzGav]

LGTM!