GHA: Add workflow for building and publishing packages. #10

Job	Run time
Build RPM / Build	3m 25s
Build DEB (bookworm, amd64) / Build	49s
Build DEB (bookworm, armhf) / Build	5m 14s
Build DEB (bullseye, amd64) / Build	42s
Build DEB (bullseye, armhf) / Build	5m 20s
Build DEB (buster, amd64) / Build	45s
Build DEB (buster, armhf) / Build	5m 21s
Build DEB (stretch, amd64) / Build	52s
Build DEB (stretch, armhf) / Build	5m 13s
Copy to remote RPM	0s
Meta RPM	0s
Copy meta to remote RPM	0s
Copy hash to remote RPM	0s
Copy to remote DEB	0s
Meta DEB	0s
Copy meta to remote DEB	0s
Copy hash to remote DEB	0s
	27m 41s

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