chore(docs): revise installation to getting started section

[alexeagle]

Updated installation section to 'Getting Started' with new starter repo information.

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[aspect-workflows]

Test (Bazel 6.x) (Test)

All tests were cache hits

25 tests (100.0%) were fully cached saving 1s.

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Test (Bazel 7.x) (Test)

All tests were cache hits

25 tests (100.0%) were fully cached saving 2s.

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Test (Bazel 8.x) (Test)

All tests were cache hits

25 tests (100.0%) were fully cached saving 2s.

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Bazel-7

e2e/bzlmodules

All tests were cache hits

1 test (100.0%) was fully cached saving 32ms.

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Bazel-8

e2e/bzlmodules

All tests were cache hits

1 test (100.0%) was fully cached saving 30ms.

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Bazel-6

e2e/external_dep

All tests were cache hits

6 tests (100.0%) were fully cached saving 262ms.

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Bazel-7

e2e/external_dep

All tests were cache hits

6 tests (100.0%) were fully cached saving 289ms.

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Bazel-8

e2e/external_dep

All tests were cache hits

6 tests (100.0%) were fully cached saving 291ms.

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Bazel-7

e2e/rules_js_v3

All tests were cache hits

1 test (100.0%) was fully cached saving 39ms.

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Bazel-8

e2e/rules_js_v3

All tests were cache hits

1 test (100.0%) was fully cached saving 31ms.

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Bazel-7

e2e/smoke

All tests were cache hits

2 tests (100.0%) were fully cached saving 107ms.

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Bazel-8

e2e/smoke

All tests were cache hits

2 tests (100.0%) were fully cached saving 149ms.

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Bazel-6

e2e/test

All tests were cache hits

25 tests (100.0%) were fully cached saving 1s.

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Bazel-7

e2e/test

All tests were cache hits

25 tests (100.0%) were fully cached saving 2s.

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Bazel-8

e2e/test

All tests were cache hits

25 tests (100.0%) were fully cached saving 2s.

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Bazel-6

e2e/worker

All tests were cache hits

6 tests (100.0%) were fully cached saving 209ms.

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Bazel-7

e2e/worker

All tests were cache hits

6 tests (100.0%) were fully cached saving 287ms.

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Bazel-8

e2e/worker

All tests were cache hits

6 tests (100.0%) were fully cached saving 363ms.

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Bazel-8

examples

All tests were cache hits

153 tests (100.0%) were fully cached saving 7s.

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