2531 add mumag to tools #3308

Job	Run time
Generate test matrix	6s
Test (ubuntu-20.04, 3.11)	2m 20s
Test (ubuntu-20.04, 3.10)	2m 30s
Test (windows-latest, 3.11)	7m 31s
Test (windows-latest, 3.10)	6m 43s
Test (macos-latest, 3.11)	2m 0s
Test (macos-latest, 3.10)	1m 42s
Test (ubuntu-latest, 3.11)	2m 25s
Test (ubuntu-latest, 3.10)	2m 22s
Installer (ubuntu-20.04, 3.11)	8m 34s
Installer (windows-latest, 3.11)	18m 2s
Installer (macos-latest, 3.11)	16m 38s
Test installer (windows-latest, 3.11)	2m 7s
Test installer (ubuntu-20.04, 3.11)	1m 33s
	1h 14m 33s

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