[Registry Preview] Copy context menu, data toltip, MULTI_SZ fix

[htcfreek]

Summary of the Pull Request

This PR...

• fixes line break parsing for REG_MULTI_SZ
• adds a tool tip to show the multiline version of value data.
• adds context menu with various copy actions to Key tree and Value list.

Screenshots

PR Checklist

• Closes: [Registry Preview] MULTI_SZ parsing: Line breaks ignored #36629 , [Registry Preview] Add context menu to key tree and value #36627
• Communication: I've discussed this with core contributors already. If 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

Manual testing.