feat(sdk): add the typed TypeScript client #416

Job	Run time
Web app	57s
Linux E2E (Docker)	3m 2s
macOS build and protocol suite	2m 26s
npm launcher	39s
Agent runtime suite	24s
Protocol suite	1m 11s
Static checks	16s
macOS E2E (WKWebView)	-1s
	8m 54s

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