Piotr Szeremeta

Add eas/submit and eas/downalod_artifacts functions

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# Why [ENG-14736: Add `eas/submit` function group](https://linear.app/expo/issue/ENG-14736/add-eassubmit-function-group) [ENG-14848: Add `eas/download_artifact`](https://linear.app/expo/issue/ENG-14848/add-easdownload-artifact) User should be able to easily create custom build which both builds and submits an app. This PR implements `eas/submit`...

Add diff log to env:pull command

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# Why [ENG-15251: Analyse EnvVar UI feedback from user](https://linear.app/expo/issue/ENG-15251/analyse-envvar-ui-feedback-from-user) Users should be aware of the changes that the command `env:pull` performs: new, changed, and deleted variables should be clearly visible....

Support pushing existing secret and sensitive variables

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# Why [ENG-14486: Support updating secret variables with `eas env:push`](https://linear.app/expo/issue/ENG-14486/support-updating-secret-vars-with-eas-envpush) https://github.com/expo/eas-cli/issues/2753 Currently, we don't support adding secrets using the `eas env:push` command. However, this behavior conflicts with the legacy `eas...