Welcome screen impl #324

Job	Run time
Test Processing	3m 32s
(linux/x64) Create Processing Build	11m 22s
(macos/x64) Create Processing Build	9m 49s
(windows/x64) Create Processing Build	8m 17s
(linux/aarch64) Create Processing Build	8m 3s
(macos/aarch64) Create Processing Build	6m 2s
	47m 5s

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