MAUI: first steps #4176

Job	Run time
linux-github--dotnet-and-mono	15s
linux-github--dotnet-and-newmono	8m 19s
linux-vanilla--newmono-only	8m 49s
linux-vanilla--stockdotnet6-and-newmono	1m 29s
linux-vanilla--stockdotnet6-and-stockmono	1m 50s
linux-vanilla--stockdotnet6-only	39s
macOS--dotnet6-and-mono	7m 32s
linux-vanilla--stockmono-only	6m 7s
macOS--dotnet6-only	10m 58s
macOS--mono-only	26m 7s
windows--dotnet6-and-legacyFramework	1m 11s
windows--dotnet6-only	1m 8s
windows--legacyFramework-only	12m 2s
conventions	0s
snap_pkg_beta	0s
snap_pkg	0s
	1h 26m 26s

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