[P2P] Adopt multiaddr

[jessicadaugherty]

Objective

Adopt Multiaddr to simplify and consolidate node identity, utilizing a standardized and extensible address format for nodes servicing and participating in Pocket Network.

Origin Document

ADR-0001

Goals

• Replace the current address convention with multiaddr
• Ensure a standardized, extensible, and future-proof addressing scheme
• Improve maintainability of the codebase

Deliverable

• Replace existing address conventions with multiaddr throughout the codebase
• Update related documentation and code comments to reflect the adoption of multiaddr

Non-goals / Non-deliverables

• Refactoring of the codebase beyond the scope of adopting multiaddr for node addressing

General issue deliverables

• Update the appropriate CHANGELOG
• Update any relevant READMEs (local and/or global)
• Update any relevant global documentation & references
• If applicable, update the source code tree explanation
• If applicable, add or update a state, sequence or flowchart diagram using mermaid

Testing Methodology

• All tests: make test_all
• LocalNet: verify a LocalNet is still functioning correctly by following the instructions at docs/development/README.md

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Creator: @jessicadaugherty