Add MCP server (#1993)

* Add MCP server

* Update docs/tools/openzeppelin-contracts.mdx

Co-authored-by: Elliot Voris <elliot@stellar.org>

---------

Co-authored-by: Elliot Voris <elliot@stellar.org>

Author: janewang

docs/tools/openzeppelin-contracts.mdx

@@ -116,3 +116,4 @@ To provide feedback on these contracts and utilties, please open issues at: [htt
 - [Relayer](https://github.com/OpenZeppelin/openzeppelin-relayer): Infrastructure for relaying transactions on Stellar.
 - [Monitor](https://github.com/OpenZeppelin/openzeppelin-monitor): Infrastructure tool for monitoring blockchain events and transactions.
 - [UI Builder](https://builder.openzeppelin.com/): Open source tool for creating UI forms for contracts.
+- [MCP Server](https://mcp.openzeppelin.com/): Generate secure Stellar smart contracts based on OpenZeppelin templates.