feat: add catalog url and js namespace for OEP-58 JS translations | FC-0012

[OmarIthawi]

Description

Support for OEP-58 JavaScript translations:

• Introduced abstract JavaScript translations support by adding the i18n_js_namespace property and get_i18n_js_namespace method to the SharedBlockBase. This allows XBlocks to define a JavaScript
  namespace so the XBlock i18n runtime service can manage and load JavaScript translations for XBlocks.
• Added the stub get_javascript_i18n_catalog_url method to the NullI18nService class to be implemented by runtime services.
• See the edx-platform atlas translations proposal

Related PRs

This pull request blocks the platform PR:

• feat: atlas pull for XBlock translations | FC-0012 edx-platform#33698

Refs

This pull request is part of the FC-0012 project which implements the Translation Infrastructure update OEP-58.

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[feanil]

@OmarIthawi let me know when you want me to merge this for you and release it. I noticed the docs build was not triggering correctly and was broken upstream so I've fixed that. You should be able to pick it up if you rebase this PR.

[OmarIthawi]

@feanil thanks for checking this. I think we need one more test case and it should be good.

I'll rebase meanwhile to fix the docs tests.

[OmarIthawi]

@feanil this is ready for merge.

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@OmarIthawi 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[feanil]

Also released here: https:/openedx/XBlock/releases/tag/xblock-1.9.0