GHA: Add workflow for building and publishing packages. #1

Job	Run time
Build RPM / Build	3m 6s
Build DEB (bullseye, amd64) / Build	23s
Build DEB (bookworm, amd64) / Build	24s
Build DEB (bookworm, armhf) / Build	24s
Build DEB (bullseye, armhf) / Build	22s
Build DEB (buster, amd64) / Build	26s
Build DEB (buster, armhf) / Build	22s
Build DEB (stretch, amd64) / Build	24s
Build DEB (stretch, armhf) / Build	26s
Meta DEB	0s
Copy to remote DEB	0s
Copy meta to remote DEB	0s
Copy hash to remote DEB	0s
Meta RPM	0s
Copy to remote RPM	0s
Copy meta to remote RPM	0s
Copy hash to remote RPM	0s
	6m 17s

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