feat: let users pass sync/async functions for resolving option values for headers/params #1939

Job	Run time
List examples	5s
List packages	7s
Build and test (packages/typescript-client)	1m 11s
Check packages/typescript-client	26s
Build and test (packages/experimental)	1m 10s
Check packages/experimental	28s
Build and test (packages/react-hooks)	1m 2s
Check packages/react-hooks	33s
Check and build examples/encryption	41s
Check and build examples/proxy-auth	51s
Check and build examples/linearlite-read-only	44s
Check and build examples/tanstack	34s
Check and build examples/linearlite	49s
Check and build examples/gatekeeper-auth	34s
Check and build examples/write-patterns	40s
Check and build examples/yjs	1m 0s
Check and build examples/remix	36s
Check and build examples/react	39s
Check and build examples/todo-app	33s
Check and build examples/bash	29s
Check and build examples/nextjs	54s
Check and build examples/redis	29s
	14m 35s

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