feat(backend): add sorting based on locale

[Oran-Dan]

Description of change

I've added a helper function to sort names respective to the locale selected by the user. The sorting is also Unicode (NFC normalization form) compatible. I've added unit and integration testing for the new functionality. I've implemented the sorting function in all actions which change the connections/credentials field.

Resources: https://sts10.github.io/2023/01/29/sorting-words-alphabetically-rust.html https://www.unicode.org/reports/tr15/#Norm_Forms

Links to any relevant issues

• 72

How the change has been tested

Tests can be found in identity-wallet/unime/src-tauri/tests/tests/sorting.rs

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• [x] I have followed the contribution guidelines for this project
• [ ] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[nanderstabel]

Looks like your branch has some conflicts that need to be resolved first.