docs: create a new "advanced" book

docs/reference/src/depth/components.md

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+# Components

docs/reference/src/depth/memoization.md

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+# Memoization

docs/reference/src/depth/performance.md

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+# Performance

docs/reference/src/depth/props.md

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+# Props

docs/reference/src/depth/rsx.md

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+# RSX

docs/reference/src/depth/testing.md

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+# Testing

docs/reference/src/depth/topics.md

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+# Topics in Depth