chore(docs): improved navigation and structure for API docs #1340

Job	Run time
verify-bcr-patches	3s
test / matrix-prep-bazelversion	3s
test / matrix-prep-os	1s
test / test (ubuntu-latest, 7.1.0, ., false)	1m 46s
test / test (ubuntu-latest, 7.1.0, e2e/smoke, true)	1m 10s
test / test (ubuntu-latest, 7.1.0, e2e/smoke, false)	1m 14s
test / test (ubuntu-latest, 7.1.0, e2e/repository-rule-deps, true)	1m 12s
test / test (ubuntu-latest, 7.1.0, e2e/system-interpreter, true)	1m 11s
test / test (ubuntu-latest, 7.1.0, examples/uv_pip_compile, true)	20s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, true)	1m 13s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, false)	1m 12s
test / test (ubuntu-latest, 6.4.0, e2e/repository-rule-deps, true)	1m 11s
test / test (ubuntu-latest, 6.4.0, e2e/system-interpreter, true)	1m 11s
	11m 47s

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