Generate declaration file for js files

[Max10240]

Which issue, if any, is this issue related to?

issuse related to generate declaration files (especially for files under lib/utils/)

Is there anything in the PR that needs further explanation?

No, it's self-explanatory.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 52e20ce

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[jeddy3]

Closing for now as issue (#6866) is still in discussion.