chore: Add PR validation workflow #7614

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	3s
diff_check / diff_check	12s
detect-changes / Detect file changes	7s
Build ios dev no-frameworks	1m 8s
Build web	4m 58s
Build ios dev dynamic-frameworks	1s
Build android dev no-frameworks	7m 0s
Build ios production dynamic-frameworks	1s
Build android production no-frameworks	7m 2s
Build ios production no-frameworks	1s
	20m 33s

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