chore: Add a source tarball deploy workflow. #274

Job	Run time
Prepare / Update nightly release tag	4s
macOS (arm64)	21s
iOS (ios-arm64)	23s
Android (armeabi-v7a)	1m 6s
macOS (x86_64)	35s
iOS (ios-armv7)	23s
Linux (aarch64)	57s
Android (arm64-v8a)	32s
iOS (ios-armv7s)	23s
Linux (x86_64)	34s
Android (x86)	29s
iOS (iphonesimulator-arm64)	23s
Android (x86_64)	25s
iOS (iphonesimulator-x86_64)	23s
WebAssembly	1m 36s
Single file / Build	9s
Source tarball / Build	31s
Xcode Framework	2m 10s
	11m 24s

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