docs: add MFE and Microservices OEP-58 instructions

[OmarIthawi]

Fill in the missing steps for both microservices and micro-frontends.

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

[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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