MAUI: first steps #4169

Job	Run time
macOS--dotnet8-and-mono	19s
macOS--mono-only	25m 44s
linux-github--dotnet-and-mono	14s
linux-github--dotnet-and-newmono	8m 48s
linux-vanilla--stockdotnet6-only	41s
linux-vanilla--stockmono-only	6m 23s
macOS--dotnet6-only	6m 37s
windows--dotnet6-and-legacyFramework	2m 33s
windows--dotnet6-only	2m 19s
windows--legacyFramework-only	13m 43s
linux-vanilla--stockdotnet6-and-newmono	1m 35s
linux-vanilla--newmono-only	8m 51s
linux-vanilla--stockdotnet6-and-stockmono	1m 28s
conventions	0s
snap_pkg_beta	0s
snap_alpha	0s
snap_pkg	0s
	1h 19m 15s

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