add utility scripts for publishing new mosaics #351

Job	Run time
call-version-info-workflow / version_info	1m 14s
call-pytest-workflow / pytest (3.10)	1m 42s
call-pytest-workflow / pytest (3.11)	1m 40s
call-pytest-workflow / pytest (3.12)	1m 40s
call-docker-ghcr-workflow / dockerize	2m 51s
	9m 7s

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