v5.3.1

Important For users of the @polkadot/ledger package, it is now included in this repo (since it is a general utility) and renamed to @polkadot/hw-ledger

Contributed:

• Add Dock Ledger integration (Thanks to https://github.com/lovesh)
• Add Polymesh Ledger integration (Thanks to https://github.com/adamdossa)
• Add flag for Ledger capabilities on networks (Thanks to https://github.com/Tbaut)

Changes:

• Move @polkadot/ledger packages into common
• Update @polkadot/networks to align with latest Substrate ss58-registry