Visibility controls on public API #590

Job	Run time
clang-tidy	11m 32s
Build (docker-linux-x64)	29m 26s
Build (windows-x64)	33m 32s
Pin Check / Pin Check	10s
Build (macos-x64)	23m 41s
Build (macos-arm64)	8m 39s
Build (docker-linux-arm64)	24m 3s
Build (linux-x64)	18m 47s
Build (linux-arm64)	15m 35s
License Check / License Check	5s
Build (cpp-example-collection-linux-arm64)	4m 3s
Build (cpp-example-collection-x64)	5m 18s
	2h 54m 51s

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