Migrate @metamask/eth-json-rpc-provider - Phase B0: Preserve git history of source repo #1793

As part of the process for migrating @metamask/eth-json-rpc-provider into the core monorepo, we will migrate the git history of the original repository by following these steps: #1079 (comment)

See #1551 (comment) for an outline of the entire process.

Phase B: Staging from merged-packages/

0. Move the migration target into a temporary directory in core (merged-packages/).

• Migrate eth-json-rpc-provider into core monorepo (1/2) #1755
  • Follow these instructions to ensure that the original git history remains fully intact after the transfer: Migrate libraries into core monorepo #1079 (comment).
  • Contact admins to temporarily enable merge commits into main.
  • Merge PR without squashing to preserve the migrated git commit history.