List languages in correct alphabetical order

### Problem

The list of languages at https://openlibrary.org/languages?sort=name doesn't display in alphabetical order correctly

The list sorts alphabetically, but differentiates between uppercase and lowercase charaters.

The list sorts alphabetically, but lists characters with diacritics at the end.

### Reproducing the bug

1. Go to https://openlibrary.org/languages?sort=name and change the website language to Croatian (or any other foreign language)
2. Scroll down the list to see the problems shown in my above images

* **Expected behavior**: the language list should display in a correct alphabetic order
* **Actual behavior**: the language list doesn't display in a correct alphabetic order

### Context

- Browser: Firefox 148.0 (aarch64)
- OS: Mac OS26.3 (25D125)
- Logged in (Y/N): N
- Environment (prod, dev, local): ???

### Breakdown

Implementation Details (for maintainers)

#### Requirements Checklist
* [ ] Sort the language list in correct alphabatical order for all website languages:
- Don't differentiate between uppercase and lowercase charaters
- Sort languages correctly using character decomposition.
For instance, in Croatian the base charater is C.
Characters Č and Ć are composite charaters of C, and should therefore appear after C, and not at the end of the list.
Same is true for other composite characters.

#### Related to issue #11961

#### Stakeholders

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