Following specification of PEP561

[siscia]

The re-exported types are considered privates.
This does not follow the specification and breaks a lot of IDEs during type checks

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What does this PR do?

Makes the package follows standard convention

Description of the Change

Adding re-exported modules to __all__

Alternate Designs

NA

Possible Drawbacks

NA

Verification Process

Additional Notes

Release Notes

Review checklist (to be filled by reviewers)

• Feature or bug fix MUST have appropriate tests (unit, integration, etc...)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have one changelog/ label attached. If applicable it should have the backward-incompatible label attached.
• PR should not have do-not-merge/ label attached.
• If Applicable, issue must have kind/ and severity/ labels attached at least.

[github-actions]

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