Welcome screen implementation (#1307) #140

Job	Run time
Test Processing	3m 55s
(linux/x64) Create Processing Build	10m 19s
(macos/x64) Create Processing Build	11m 46s
(linux/aarch64) Create Processing Build	8m 19s
(windows/x64) Create Processing Build	5m 52s
(macos/aarch64) Create Processing Build	4m 30s
	44m 41s

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