"Wave Goodbye to Hubble: Snapchain Takes Center Stage in Farcaster Transformation!"

"In a bold move to streamline operations and enhance efficiency, Snapchain's ascension leaves Hubble in the shadows, marking a pivotal shift in hub technology."

Commit Details:

chore: Remove references to Hubble (#2581) ## Why is this change needed? Snapchain is the new implementation of a Farcaster hub. Removing these references will reduce confusion and significantly speed up the test suite for this repository. ## Merge Checklist - [x] PR title adheres to the [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) standard - [ ] PR has a [changeset](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#35-adding-changesets) - [ ] PR has been tagged with a change label(s) (i.e. documentation, feature, bugfix, or chore) - [x] PR includes [documentation](https://github.com/farcasterxyz/hub-monorepo/blob/main/CONTRIBUTING.md#32-writing-docs) if necessary.