Investigate why `createIdmWallet` blocks the event loop for some time

## Description

Investigate why `createIdmWallet` blocks the event loop for some time. I've noticed this after I've implemented https://github.com/ipfs-shipyard/pm-idm/issues/148, where the loader breaks.

I suspect this has to do with IPFS. If that's the case, we might want to try using the service-worker-gateway, which runs a node in a separate thread.

## Acceptance Criteria

- [ ] Investigate why why `createIdmWallet` blocks the event loop for some time and act accordingly

Start by tracing and profiling createIdmWallet while reproducing the loader failure described in issue #148. Determine whether IPFS is blocking the event loop, then follow the findings toward an appropriate change such as the service-worker-gateway; the issue is done when the cause is established and the resulting action is addressed.

Written by the indexing model from the issue text.