chore(js): add expo example app and move to pnpm #775

Job	Run time
Run checks (ubuntu-latest)	27s
Run checks (macos-latest)	29s
Run checks (windows-latest)	1m 31s
Build library (iOS) (aarch64-apple-ios)	42s
Build library (Android) (aarch64-linux-android)	41s
Build library (iOS) (aarch64-apple-ios-sim)	42s
Build library (linux-aarch64, ubuntu-latest, libaries_askar.so, aarch64-unknown-linux-gnu, true)	38s
Build library (Android) (armv7-linux-androideabi)	40s
Build library (iOS) (x86_64-apple-ios)	43s
Build library (linux-x86_64, ubuntu-latest, libaries_askar.so, x86_64-unknown-linux-gnu, true)	40s
Run tests (ubuntu-latest)	42s
Build library (Android) (i686-linux-android)	40s
Build library (darwin-universal, macos-latest, libaries_askar.dylib, darwin-universal, beta)	41s
Run tests (macos-latest)	41s
Build library (Android) (x86_64-linux-android)	38s
Build library (windows-x86_64, windows-latest, aries_askar.dll, x86_64-pc-windows-msvc)	26s
Run tests (windows-latest)	26s
Create library (Android)	1s
Build and test Python wrapper	1s
Build and test JavaScript wrapper	1s
Successful build	1s
Create iOS xcframework	1s
Create iOS and Android release assets	1s
	11m 33s

Provide feedback