Create Multiple Gallery Store Images

[dowhep]

Closes #339.

[github-actions[bot]]

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[dowhep]

Will add the postman requests soon

[dowhep]

Postman Request:

[dowhep]

One last design comment is that since we are letting frontend to have full control over how position would work, there would also be no duplicate position checking to the backend intentionally.

[nishantbalaji]

IT HAPPENED