docs: [C] 各アイテムからRust APIにリンクを張る #3516

Job	Run time
actionlint	24s
rust-lint	4m 19s
shellcheck	23s
build-and-test-python-api (windows-latest)	9m 7s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	2m 6s
build-and-test-java-api (windows-latest)	6m 54s
build-and-test-python-api (macos-latest)	5m 6s
build-and-test-python-api (ubuntu-latest)	5m 52s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	1m 48s
build-and-test-java-api (macos-latest)	4m 48s
build-and-test-java-api (ubuntu-latest)	3m 35s
build-windows-cpp-example	3m 46s
c-header	49s
rust-integration-test-strategy-matrix	1s
rust-unit-test	6m 29s
validate-cargo-lock	30s
rust-integration-test (macos-13)	4m 1s
rust-integration-test (ubuntu-20.04)	2m 2s
	1h 2m 0s

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