[docs] READMEのドキュメントの順番を整理 #2206

Job	Run time
actionlint	24s
build-and-test-java-api (windows-latest)	10m 50s
build-and-test-java-api (macos-latest)	4m 27s
build-and-test-java-api (ubuntu-latest)	5m 0s
build-and-test-python-api (windows-latest)	11m 40s
build-and-test-python-api (macos-latest)	4m 20s
build-and-test-python-api (ubuntu-latest)	3m 56s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	2m 50s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	3m 18s
build-windows-cpp-example	6m 12s
c-header	1m 15s
rust-integration-test-strategy-matrix	3s
rust-lint	3m 58s
rust-unit-test	5m 16s
shellcheck	21s
validate-cargo-lock	35s
rust-integration-test (windows-2019, directml)	4m 37s
rust-integration-test (macos-11)	2m 32s
rust-integration-test (ubuntu-20.04)	2m 0s
	1h 13m 34s

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