chore: output esm as modules

[ryanleecode]

We can output ESM as modules instead of one big file. Should help with https://github.com/livekit/client-sdk-js/issues/1273

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Latest commit: c249fa774353658659dda08be0d99d3a589f9d7c

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[lukasIO]

appreciate the PR, have you done any benchmarks comparing the file sizes of tree shaking imports with/without single file output?

[lukasIO]

closing due to inactivity