feat: Add Intelij Rider for Autoconfig support (#448)

Author: DeTandtThibaut

MCPForUnity/Editor/Clients/Configurators/RiderConfigurator.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using MCPForUnity.Editor.Models;
+
+namespace MCPForUnity.Editor.Clients.Configurators
+{
+    public class RiderConfigurator : JsonFileMcpConfigurator
+    {
+        public RiderConfigurator() : base(new McpClient
+        {
+            name = "Rider GitHub Copilot",
+            windowsConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "JetBrains", "Rider", "mcp.json"),
+            macConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Library", "Application Support", "JetBrains", "Rider", "mcp.json"),
+            linuxConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".config", "JetBrains", "Rider", "mcp.json"),
+            IsVsCodeLayout = true
+        })
+        { }
+
+        public override IList<string> GetInstallationSteps() => new List<string>
+        {
+            "Install GitHub Copilot plugin in Rider",
+            "Open or create mcp.json at the path above",
+            "Paste the configuration JSON",
+            "Save and restart Rider"
+        };
+    }
+}
+