Use new MCP config path for VS Code 1.102 and later (#1091)

Release 1.102 of VS Code expects MCP configuration to be defined in an mcp.json file instead of the settings.json file. Change the configuration code to use this new file instead.

As part of this change, we debated whether we should support the old path as well. We decided not to since:

1. VS Code pushes updates aggressively, so we do not think that old
versions will remain in use long term.

2. MCP support in the older releases was in a "preview" mode, so it was
not intended to be stable long term.

Author: dmjb

pkg/client/config.go

@@ -111,7 +111,7 @@ var supportedClientIntegrations = []mcpClientConfig{
 	{
 		ClientType:   VSCodeInsider,
 		Description:  "Visual Studio Code Insiders",
-		SettingsFile: "settings.json",
+		SettingsFile: "mcp.json",
 		RelPath: []string{
 			"Code - Insiders", "User",
 		},
@@ -120,7 +120,7 @@ var supportedClientIntegrations = []mcpClientConfig{
 			"darwin":  {"Library", "Application Support"},
 			"windows": {"AppData", "Roaming"},
 		},
-		MCPServersPathPrefix: "/mcp/servers",
+		MCPServersPathPrefix: "/servers",
 		Extension:            JSON,
 		SupportedTransportTypesMap: map[types.TransportType]string{
 			types.TransportTypeStdio:          "sse",
@@ -132,11 +132,11 @@ var supportedClientIntegrations = []mcpClientConfig{
 	{
 		ClientType:   VSCode,
 		Description:  "Visual Studio Code",
-		SettingsFile: "settings.json",
+		SettingsFile: "mcp.json",
 		RelPath: []string{
 			"Code", "User",
 		},
-		MCPServersPathPrefix: "/mcp/servers",
+		MCPServersPathPrefix: "/servers",
 		PlatformPrefix: map[string][]string{
 			"linux":   {".config"},
 			"darwin":  {"Library", "Application Support"},