feat(mcp): upgrade client SDK to v2 (#39247)

Co-authored-by: Matt Carey <mcarey@cloudflare.com>

packages/sdk/js/src/v2/gen/sdk.gen.ts

@@ -2328,6 +2328,7 @@ export class Auth2 extends HeyApiClient {
       directory?: string
       workspace?: string
       code?: string
+      iss?: string
     },
     options?: Options<never, ThrowOnError>,
   ) {
@@ -2340,6 +2341,7 @@ export class Auth2 extends HeyApiClient {
             { in: "query", key: "directory" },
             { in: "query", key: "workspace" },
             { in: "body", key: "code" },
+            { in: "body", key: "iss" },
           ],
         },
       ],

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -8563,6 +8563,7 @@ export type McpAuthStartResponse = McpAuthStartResponses[keyof McpAuthStartRespo
 export type McpAuthCallbackData = {
   body?: {
     code: string
+    iss?: string
   }
   path: {
     name: string