Improve gossipsub module: fix typos, naming consistency and error handling

[aso20455]

1. Fixing typos in documentation:

   • "gurantees" → "guarantees"
   • "occuring" → "occurring"

2. Improving naming consistency:

   • Renamed "gossip_retransimission" to "gossip_retransmission" throughout the codebase

3. Enhancing error handling and safety:

   • Replaced unsafe unwrap()/expect() calls with safer alternatives
   • Added proper error handling for peer ID creation
   • Improved error messages for configuration errors

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