feat: add --filter parameter to select specific languages/files

[OmarIthawi]

Usage:

$ atlas pull --filter=ar,es_419

This filters (includes) directories named ar and es_419 and files named ar.* and es_419.

Full docs are available in a separate PR #8

References

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

Check the links above for full information about the overall project.

Internalization is being rearchitected in Open edX Python, XBlock, Micro-frontend, and other projects. There are a number of immediately visible changes:

• Remove source and language translations from the repositories, hence no .json, .po or .mo files will be committed into the repos.
• Add standardized make extract_translations in all repositories
• Push user-facing messages strings into openedx/openedx-translations.
• Integrate root repositories with openedx/openedx-atlas to pull translations on build/deploy time

Breaking Changes

One of the primary goals of the project is to avoid breaking changes. If you noticed any suspicious code, please raise your concern.

[openedx-webhooks]

Thanks for the pull request, @OmarIthawi! Please note that it may take us up to several weeks or months to complete a review and merge your PR.

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[openedx-webhooks]

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