Short Description

This PR adds a feature where a credentials.yaml file is auto generated during the pull (openfn project pull <project-id>).

Fixes #1261

Implementation Details

• It picks up all referenced credentials from the project yaml file and then generate the credetnials.yaml or .json file from it.

QA Notes

List any considerations/cases/advice for testing/QA here.

AI Usage

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Release branch checklist

Delete this section if this is not a release PR.

If this IS a release branch:

• Run pnpm changeset version from root to bump versions
• Run pnpm install
• Commit the new version numbers
• Run pnpm changeset tag to generate tags
• Push tags git push --tags

Tags may need updating if commits come in after the tags are first generated.