build

[infra] Add setup-amper action for caches #13

Job	Run time
Standard tests (windows-latest)	2h 5m 35s
Standard tests (macos-latest)	6h 5m 0s
Mobile tests (iOS examples)	19m 28s
Standard tests (ubuntu-latest)	1h 30m 18s
Mobile tests (Android examples)	23m 39s
	10h 24m 0s

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