chore: ignore extracted iOS app project #372

Job	Run time
Build integration artifacts	2m 31s
Client lint, build, and tests	35s
Rust lint and unit tests	1m 21s
Packages and VS Code extension	39s
Android emulator integration	6m 47s
CLI simulator integration	10m 31s
JS API simulator integration	4m 52s
	27m 16s

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