docs: `boundaries` experimental page #4100

Job	Run time
Find path changes	3s
Rust lints	5m 47s
Turborepo Rust testing on ubuntu	7m 34s
Turborepo Integration (ubuntu-latest)	1m 37s
Turborepo rust check	4m 50s
Turborepo Rust testing on macos	9m 25s
Turborepo Integration (macos-13)	4m 22s
Turborepo Rust testing on windows	12m 17s
Turborepo Integration (windows-latest)	4m 1s
`basic` example	0s
`kitchen-sink` example	0s
`non-monorepo` example	0s
`with-svelte` example	0s
`with-tailwind` example	0s
Turborepo Test Summary	1s
Cleanup / cleanup	5s
	50m 2s

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