Add quickstart repository reference to ERC-8004 tutorial

Added Example Code and Scripts section linking to FilOzone/FilecoinPin-for-ERC8004 repository to help users get started with Filecoin Pin and agent registration.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: hammertoe

builder-cookbook/filecoin-pin/erc-8004-agent-registration.md

@@ -23,6 +23,14 @@ A GitHub Integration Agent that references GitHub's official MCP server, demonst
 
 ***
 
+## Example Code and Scripts
+
+For example code and helper scripts to help with using Filecoin Pin and agent registration, check out the quickstart repository:
+
+**GitHub Repository**: [FilOzone/FilecoinPin-for-ERC8004](https://github.com/FilOzone/FilecoinPin-for-ERC8004)
+
+***
+
 ## Why Filecoin Pin for Agent Storage?
 
 Agent cards need persistent storage with provable guarantees. Unlike generic IPFS pinning services that may stop hosting your data without notice, Filecoin Pin provides: