Copy README images when generating docs

[bcherry]

This should fix the broken image on top of https://docs.livekit.io/client-sdk-js/

[changeset-bot]

⚠️ No Changeset found

Latest commit: 502ebc9

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[github-actions]

size-limit report 📦

Path	Size
dist/livekit-client.esm.mjs	83.94 KB (0%)
dist/livekit-client.umd.js	90.01 KB (0%)

[lukasIO]

nice