Flutter build

Add refresh button to quickstart, add collaboration docs #4351

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Run time

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Job	Run time
Build flatpak	5m 24s
build-linux	4m 25s
build-macos	8m 41s
build-windows	6m 37s
deploy-to-play-store	0s
build-apk	5m 45s
deploy	23s
publish-winget	0s
	31m 15s