Missing support for R-to-L translation

[israelcefrin]

Describe the bug
When a Journal uses a locale for languages that are R-to-L read, e.g. ar-IQ, the theme doesn't change the text direction.

To Reproduce
Steps to reproduce the behavior:

1. Enable ar-IQ or any R-to-L locale
2. Go to the public interface
3. Click on the locale that was installed and enabled
4. See error

Expected behavior
It is expected that all text content changes the reading direction.

Screenshots

Desktop (please complete the following information):

• OS: any
• Browser : any

Smartphone (please complete the following information):

• Device: any
• OS: any
• Browser : any

Additional context
I've added a workaround in this journal: https://jmlph.net/index.php/jmlph, including an IF/ELSE to inject dir="rtl" class="rtl" in the HTML tag. However, it is required to check every R-to-L language and, maybe, create an array for verification.