[DOCUMENT][DEMO] Block by block state sync

[jessicadaugherty]

Objective

Productionize an E2E demo of state sync using localnet to show the functionality of the state sync server, state machines, and the download and application of blocks on a node by node basis.

Origin Document

Iteration Demos

Goals

• Demo the state sync functionality and provide instructions on how other contributors or users can recreate the demo on their local envs

Deliverable

• Bonus: A PR that adds documentation on how a developer can effectively debug & develop state sync
• A PR that includes a markdown file with demo goals and instructions on how to use state sync locally
• Updates to the demo diagram

Non-goals / Non-deliverables

• Demo'ing additional localnet or V1 functionality

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