docs: improved instructions for Gemini CLI MCP server

Added CLI installation instructions for Chrome DevTools MCP server using Gemini CLI.

Author: bouiboui

README.md

@@ -103,7 +103,15 @@ Go to `Cursor Settings` -> `MCP` -> `New MCP Server`. Use the config provided ab
 <details>
   <summary>Gemini CLI</summary>
   Follow the <a href="https://github.com/google-gemini/gemini-cli/blob/main/docs/tools/mcp-server.md#how-to-set-up-your-mcp-server">MCP guide</a>
-  using the standard config from above.
+  using the standard config from above. You can also install the Chrome DevTools MCP server using the Gemini CLI:
+
+```bash
+# Project-wide
+gemini mcp add chrome-devtools npx chrome-devtools-mcp@latest
+
+# Global
+gemini mcp add -s user chrome-devtools npx chrome-devtools-mcp@latest
+```
 </details>
 
 <details>