Centralize package metadata and refresh NuGet descriptions (#114) #42

Job	Run time
call-template / build-test (10.0.x)	1m 34s
call-template / build-test (8.0.x)	1m 43s
call-template / codeql / Analyze (csharp)	4m 6s
call-template / build-test (9.0.x)	1m 42s
call-template / tests-aggregate	7s
	9m 12s

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