docs: add experimentalMinChunkSize to migration guide#21892

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o-m12a wants to merge 3 commits intovitejs:mainfrom

o-m12a:docs/migration-experimentalMinChunkSize

Commits on Mar 16, 2026

docs: add experimentalMinChunkSize to migration guide

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Commits on Mar 20, 2026

docs: clarify that codeSplitting.minSize requires groups

o-m12a
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claude
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docs: state no direct equivalent for experimentalMinChunkSize

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claude
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