Update intro.md

Author: Cashmaney

docs/devdocs/Setting Up Your Environment/intro.md

@@ -13,6 +13,7 @@ The following environments are recommended for development on Fhenix:
 - [Fhenix Hardhat Example](./Hardhat.md)
 - [Fhenix with Remix](./Remix.md)
 - [Gitpod Environment](./Gitpod.mdx)
+- [Foundry](./Foundry.md)
 
 :::note[Note]
 The main developer tools are all based on Javascript & Solidity, but we have open bounties to add support for Python & Vyper!
@@ -22,4 +23,4 @@ If you just want to utilize one of the tools in your own environment, take a loo
 
 - [Fhenix-Remix-Plugin](../Tools%20and%20Utilities/Fhenix-Remix-Plugin.md)
 - [Fhenix-Encryption-UI](../Tools%20and%20Utilities/Fhenix-Encryption-UI.md)
-- [Hardhat-Plugin](../Tools%20and%20Utilities/Fhenix-Hardhat-Plugin.md)
+- [Hardhat-Plugin](../Tools%20and%20Utilities/Fhenix-Hardhat-Plugin.md)