MAUI: first steps #4154

Job	Run time
macOS--mono-only	25m 11s
linux-github--dotnet-and-mono	5m 48s
linux-github--dotnet-and-newmono	8m 49s
linux-vanilla--newmono-only	9m 19s
linux-vanilla--stockdotnet6-and-newmono	6m 13s
linux-vanilla--stockdotnet6-only	5m 33s
linux-vanilla--stockmono-only	6m 22s
macOS--dotnet6-and-mono	6m 35s
linux-vanilla--stockdotnet6-and-stockmono	6m 49s
macOS--dotnet6-only	5m 56s
windows--dotnet6-and-legacyFramework	1m 46s
windows--dotnet6-only	2m 3s
windows--legacyFramework-only	7m 44s
conventions	0s
snap_pkg_beta	0s
snap_pkg	0s
	1h 38m 8s

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