feat(did-provider-dht): Implement DID Provider for did:dht

[walnut07]

What issue is this PR fixing

closes #1374

What is being changed

This PR implements a new plugin did-provider-dht, which is a new DID method defined by TBD.

Quality

Check all that apply:

• I want these changes to be integrated
• I successfully ran pnpm i, pnpm build, pnpm test, pnpm test:browser locally.
• I allow my PR to be updated by the reviewers (to speed up the review process).
• I added unit tests.
• I added integration tests.
• I did not add automated tests because _________, and I am aware that a PR without tests will likely get rejected.

Details