Create Synchronization.md

[ChanceBarimbao]

Description of Changes

Created Guide docs for how to synchronize overlay nodes

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Testing Procedure

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• I have added new unit tests
• All tests pass locally
• I have tested manually in my local environment

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• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have updated CHANGELOG.md with my changes
• I have run npm run doc and npm run lint one final time before requesting a review
• I have fixed all linter errors to ensure these changes are compliant with ts-standard
• I have run npm version patch so that my changes will trigger a new version to be released when they are merged

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✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

This PR introduces comprehensive documentation for the GASP (Graph Aware Sync Protocol) synchronization mechanism used by overlay nodes. The guide provides detailed instructions for configuring and validating synchronization between overlay nodes.

Key changes:

• Added explanation of GASP protocol fundamentals and architecture
• Documented two configuration approaches: CARS (managed) and direct setup
• Included complete code examples showing OverlayExpress server configuration with GASP sync enabled

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[Copilot]

The code block is missing a language identifier. It should be specified as ```sql or another appropriate language identifier to enable proper syntax highlighting.

[Copilot]

The code block is missing a language identifier. It should be specified as ```sql or another appropriate language identifier to enable proper syntax highlighting.