Add a branded sidebar image to the Windows installer and improve icon #2298

Job	Run time
build (macos-14)	13m 31s
build (ubuntu-24.04-arm)	31m 21s
build (ubuntu-latest)	31m 56s
build (windows-2022)	30m 11s
build (macos-14, x64)	36m 28s
test-and-upload-Linux (ubuntu-latest)	4m 27s
test-and-upload-Linux (ubuntu-24.04-arm)	4m 6s
	2h 32m 0s

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