Refactor ClaudeCodeConfigurator to use JsonFileMcpConfigurator (CoplayDev#545)

The old CLI file map does not seem to work for the latest CC(V2.1.4), with errors that cannot recognize any symbols after uvx.exe, whether it be --no-cache, --refresh, or --from. I did not find any documentation change of why this cannot use.
I temporarily revert the current Claude Code registration to the old JSON way, which still works. Will look for a fix that could retain the CLI command usage.

Author: Scriptwonder

MCPForUnity/Editor/Clients/Configurators/ClaudeCodeConfigurator.cs

@@ -1,24 +1,30 @@
+using System;
 using System.Collections.Generic;
+using System.IO;
 using MCPForUnity.Editor.Models;
 
 namespace MCPForUnity.Editor.Clients.Configurators
 {
-    public class ClaudeCodeConfigurator : ClaudeCliMcpConfigurator
+    public class ClaudeCodeConfigurator : JsonFileMcpConfigurator
     {
         public ClaudeCodeConfigurator() : base(new McpClient
         {
             name = "Claude Code",
-            windowsConfigPath = string.Empty,
-            macConfigPath = string.Empty,
-            linuxConfigPath = string.Empty,
+            windowsConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".claude.json"),
+            macConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".claude.json"),
+            linuxConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".claude.json"),
+            SupportsHttpTransport = true,
+            HttpUrlProperty = "url", // Claude Code uses "url" for HTTP servers
+            IsVsCodeLayout = false,  // Claude Code uses standard mcpServers layout
         })
         { }
 
         public override IList<string> GetInstallationSteps() => new List<string>
         {
-            "Ensure Claude CLI is installed",
-            "Use the Register button to register automatically\nOR manually run: claude mcp add UnityMCP",
-            "Restart Claude Code"
+            "Open your project in Claude Code",
+            "Click Configure in MCP for Unity (or manually edit ~/.claude.json)",
+            "The MCP server will be added to the global mcpServers section",
+            "Restart Claude Code to apply changes"
         };
     }
 }