feat(hermes): add ipfs connection opening to doc_sync

[aido-mth]

Description

Implemented channel opening for doc-sync RTE

Related Issue(s)

Closes #627

Description of Changes

• Add pubsub subscription to doc-sync runtime extension
• Add DOC_SYNC_STATE that keeps track of all active channel subscriptions across all apps
• Update api.wit so close does not accept channel name
• Add test that checks if connection is opened

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[github-actions]

📚 Docs Preview

The docs for this PR can be previewed at the following URL:

https://docs.dev.projectcatalyst.io/hermes/aido/627/hermes-doc-sync

[rafal-ch]

LGTM 👍

[rafal-ch]

LGTM 👍