[Quick Accent] Add ǽ and ϑ

[PesBandi]

Summary of the Pull Request

Adds LATIN SMALL LETTER AE WITH ACUTE and GREEK THETA SYMBOL

PR Checklist

• [x] Closes: #32533 and #32757
• [x] Communication: I've discussed this with core contributors already (ethanfangg approved in Would you like to contribute).
• [x] Tests: Added/updated and all pass
• [x] Localization: All end user facing strings can be localized
• [x] Dev docs: No need
• [x] New binaries: None
• [x] Documentation updated: No need

Validation Steps Performed

Observing