chore(docs): improved navigation and structure for API docs #1344

Job	Run time
verify-bcr-patches	2s
test / matrix-prep-bazelversion	2s
test / matrix-prep-os	1s
test / test (ubuntu-latest, 7.1.0, ., false)	11m 24s
test / test (ubuntu-latest, 7.1.0, e2e/smoke, true)	6m 10s
test / test (ubuntu-latest, 7.1.0, e2e/smoke, false)	3m 7s
test / test (ubuntu-latest, 7.1.0, e2e/repository-rule-deps, true)	5m 23s
test / test (ubuntu-latest, 7.1.0, e2e/system-interpreter, true)	5m 27s
test / test (ubuntu-latest, 7.1.0, examples/uv_pip_compile, true)	24s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, true)	5m 53s
test / test (ubuntu-latest, 6.4.0, e2e/smoke, false)	3m 11s
test / test (ubuntu-latest, 6.4.0, e2e/repository-rule-deps, true)	5m 34s
test / test (ubuntu-latest, 6.4.0, e2e/system-interpreter, true)	5m 35s
	52m 13s

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