feat(core,host): initial aggregation API #643

Job	Run time
Test raiko-lib	1m 26s
build-test-native / Run integration tests on native / Build and run integration	4m 1s
build-test-native / Build and test native / Build and test	8m 4s
build-test-risc0 / Build and test risc0 / Build and test	27m 27s
build-test-risc0 / Run integration tests on risc0 / Build and run integration	12m 20s
build-test-sgx-all / Build and test sgx / Build and test	7m 47s
build-test-sgx-all / Build and test sgx with Docker / Build and test sgx with Docker	5m 6s
build-test-sgx-all / Build and test sgx in hardware / Build and test sgx in hardware	19m 23s
build-test-sgx-all / Run integration tests on sgx / Build and run integration	4m 13s
build-test-sp1 / Build and test sp1 / Build and test	36m 8s
build-test-sp1 / Run integration tests on sp1 / Build and run integration	10m 16s
	2h 16m 11s

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