[Quick Accent] Add Maltese language (#39473)

# **PR inspired by: #32862**

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
Adds [Maltese latin alphabet
symbols](https://en.wikipedia.org/wiki/Maltese_language#Alphabet) (ċ, ġ,
ħ, ż), [grave accented
vowels](https://en.wikipedia.org/wiki/Grave_accent#Stress) (à, è, ì, ò,
ù) and the Euro (€) sign [Malta's currency] as a supported language into
Quick Accent.

![2025-05-15 22_04_53-PowerToys Settings-Quick
Accent-Maltese](https://github.com/user-attachments/assets/fb010b5e-abe3-4cf2-8191-f7ecf551d429)


![Quick-Accent-Maltese-Preview](https://github.com/user-attachments/assets/688588a2-34d5-4f3b-bd76-752d952ee7d8)

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## PR Checklist

- [x] **Closes:** #39472
- [x] **Communication:** I've
[proposed](https://github.com/microsoft/PowerToys/issues/28769#issuecomment-2884852675)
to add this feature in the thread
- [x] **Tests:** No need
- [x] **Localization:** All end user facing strings can be localized
- [x] **Dev docs:** No need
- [x] **New binaries:** None
- [x] **Documentation updated:** No need

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Observing

.github/actions/spell-check/expect.txt

@@ -1008,6 +1008,7 @@ Mso
 msrc
 msstore
 msvcp
+MT
 MTND
 MULTIPLEUSE
 multizone