feat: Re-export SmithyIdentity components to hide Smithy dependency #3716

Job	Run time
apple (macos-13, Xcode_15.2, platform=iOS Simulator,OS=17.2,name=iPhone 15)	20m 13s
apple (macos-13, Xcode_15.2, platform=tvOS Simulator,OS=17.2,name=Apple TV 4K (3rd generation) (a...	12m 56s
apple (macos-13, Xcode_15.2, platform=visionOS Simulator,OS=1.0,name=Apple Vision Pro)	13m 39s
apple (macos-13, Xcode_15.2, platform=OS X)	11m 19s
linux (jammy, 5.9)	6m 56s
apple (macos-14, Xcode_15.4, platform=iOS Simulator,OS=17.5,name=iPhone 15)	9m 56s
linux (jammy, 5.10)	6m 32s
apple (macos-14, Xcode_15.4, platform=tvOS Simulator,OS=17.5,name=Apple TV 4K (3rd generation) (a...	7m 40s
linux (amazonlinux2, 5.9)	6m 57s
apple (macos-14, Xcode_15.4, platform=visionOS Simulator,OS=1.2,name=Apple Vision Pro)	12m 19s
linux (amazonlinux2, 5.10)	6m 14s
apple (macos-14, Xcode_15.4, platform=OS X)	11m 0s
	2h 5m 41s

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