CmdPal: Add a pinned commands section to the Home page and enable reordering

[jiripolasek]

Summary of the Pull Request

This PR adds a new section for pinned to Home page and commands to re-order them

• Updates the settings model for pinned command persistence, moving from per-provider lists to a single ordered list.
• Adds context menu commands for pinned items to reorder them (move up, move down, move to top).

PR Checklist

• Related to: CmdPal: Pinned top-level commands section #45865

• Communication: I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end-user-facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[jiripolasek]

Holy mother of frags, I totally forgot about this!

This PR needs to incorporate a conversion from the current settings model (pinned items are stored per provider -> pinned items are stored centrally).