[docs] ユーザーガイドを追加 #2337

Job	Run time
actionlint	22s
c-header	50s
rust-integration-test-strategy-matrix	1s
rust-lint	3m 51s
rust-unit-test	3m 1s
shellcheck	15s
validate-cargo-lock	23s
build-and-test-java-api (windows-latest)	6m 36s
build-and-test-java-api (macos-latest)	4m 3s
build-and-test-java-api (ubuntu-latest)	2m 53s
build-and-test-python-api (windows-latest)	8m 0s
build-and-test-python-api (macos-latest)	6m 54s
build-and-test-python-api (ubuntu-latest)	2m 45s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	6m 33s
build-windows-cpp-example	5m 27s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	2m 1s
rust-integration-test (windows-2019, directml)	4m 7s
rust-integration-test (macos-11)	2m 42s
rust-integration-test (ubuntu-20.04)	1m 12s
	1h 1m 56s

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