[TASK-548] NLP add rtl script support

[magicznyleszek]

Checklist

1. If you've added code that should be tested, add tests
2. If you've changed APIs, update (or create!) the documentation
3. Ensure the tests pass
4. Make sure that your code lints and that you've followed our coding style
5. Write a title and, if necessary, a description of your work suitable for publishing in our release notes
6. Mention any related issues in this repository (as #ISSUE) and in other repositories (as kobotoolbox/other#ISSUE)
7. Open an issue in the docs if there are UI/UX changes

Description

Any transcript or translation text written in RTL script will be displayed correctly.

Notes

The dir='auto' attribute is magically doing all the job. I thought there would be a way to set it as default for every HTML node, but it doesn't seem to work. Adding it to each node with RTL text does the job.

[notion-workspace]

RTL languages should be displayed as such for both Translations and Transcripts [Frontend]

[LMNTL]

Works for me! I have a functional question about the Django templates, but it's not a blocker - the addition seems benign, just not sure what it's doing.

[LMNTL]

Does this line do anything? As you noted in the PR description, dir="auto" doesn't appear to transfer down to child elements. I can't find a difference on /accounts/login/ - the layout, text direction, and input text direction appear to all stay the same as on beta, whether using an RTL or LTR language.

[magicznyleszek]

I thought that although it doesn't transfer down, it does something sometimes :P I tried to find any documentation or SO question that would confirm that, but there is nothing. I removed it