fix(node): export the structural RpcFunctionsHost type from devframe/node #386

Job	Run time
e2e	2m 31s
unit-test / lint	1m 31s
unit-test / test (ubuntu-latest, 24)	2m 10s
unit-test / test (windows-latest, 26)	4m 11s
unit-test / test (windows-latest, 22)	4m 24s
unit-test / test (ubuntu-latest, 22)	1m 54s
unit-test / test (windows-latest, 24)	4m 27s
unit-test / test (ubuntu-latest, 26)	1m 58s
	23m 6s

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