Enhanced the function of QuickAccent according to the Scheme of the Chinese Phonetic Alphabet(Pinyin).

[char-46]

Summary of the Pull Request

Enhanced the function of QuickAccent according to the Scheme of the Chinese Phonetic Alphabet(Pinyin).

PR Checklist

• [x] Closes: #21300
• [ ] 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
• [x] 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

[char-46]

@microsoft-github-policy-service agree

[char-46]

What else do I have to do before this PR is merged into the main branch.

[taras-janea]

LGTM