ci: rework publish job to use bundlr+ARNS to host code on Arweave subdomain

Have tried swapping to a fork, `eggy`, but am running into some issues. Will need to investigate further.

Start by locating the current CI publish job and reviewing the attempted `eggy` fork, along with the issues encountered. Confirm how the job should use bundlr and ARNS to host the code on an Arweave subdomain; the issue names no files or tests, so completion requires validating the revised publishing workflow.

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