MAUI: first steps #4116

Job	Run time
windows--dotnet8-and-legacyFramework	18m 54s
macOS--dotnet8-and-mono	18m 25s
macOS--mono-only	11m 51s
macOS--dotnet8-only	6m 45s
windows--legacyFramework-only	15m 2s
windows--dotnet8-only	18m 10s
linux-github--dotnet-and-mono	7m 34s
linux-github--dotnet-and-newmono	8m 9s
linux-vanilla--newmono-only	9m 18s
linux-vanilla--stockdotnet8-and-newmono	6m 18s
linux-vanilla--stockdotnet8-and-stockmono	6m 50s
linux-vanilla--stockdotnet8-only	5m 23s
linux-vanilla--stockmono-only	6m 7s
conventions	1m 39s
snap_pkg	7m 47s
snap_alpha	5m 0s
snap_pkg_beta	7m 22s
	2h 40m 34s

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