Add dictionary API to cgo wrapper #892

Job	Run time
Build and test cmake:gcc9	29s
Build and test cmake:clang15	40s
Build and test cmake:clang15:asan	51s
Build and test cmake:clang15:tsan	51s
Build and test cmake:clang15:ubsan	1m 1s
Build and test cmake:qemu-arm-neon-gcc	58s
Build and test cmake-osx:clang	24s
Build and test cmake-osx:gcc	52s
Build and test cmake-win64:msvc-rel	1m 15s
Build and test cmake-win64:msvc-dbg	1m 18s
Build and test fuzz:clang15	33s
Build and test python3.10:clang15	1m 59s
Build and test python3.10-win	30s
Build and test maven	33s
Build and test bazel:root	54s
Build and test bazel:go	1m 7s
Build and test bazel:java	2m 4s
Build and test bazel:research	59s
Build and test bazel-osx:root	43s
Build and test bazel-osx:go	1m 6s
Build and test bazel-osx:java	4m 0s
Build and test bazel-osx:research	1m 11s
Build and test bazel-win:root	1m 30s
Build and test bazel-win:java	4m 4s
Build and test bazel-win:research	1m 22s
	31m 14s

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