MAUI: first steps #4130

Job	Run time
macOS--mono-only	3m 29s
windows--dotnet8-and-legacyFramework	7m 31s
macOS--dotnet8-only	1m 40s
macOS--dotnet8-and-mono	9m 22s
linux-vanilla--stockdotnet8-and-newmono	1m 55s
linux-github--dotnet-and-newmono	2m 23s
linux-github--dotnet-and-mono	1m 19s
linux-vanilla--newmono-only	3m 33s
linux-vanilla--stockdotnet8-and-stockmono	2m 3s
linux-vanilla--stockmono-only	1m 46s
linux-vanilla--stockdotnet8-only	1m 6s
windows--dotnet8-only	7m 6s
windows--legacyFramework-only	9m 27s
conventions	0s
snap_alpha	0s
snap_pkg	0s
snap_pkg_beta	0s
	52m 40s

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