add index.ts barrel files for @modelcontextprotocol/sdk/server, @modelcontextprotocol/sdk/client and @modelcontextprotocol/sdk/shared

Author: KKonstantinov

package.json

@@ -31,6 +31,10 @@
       "import": "./dist/esm/server/index.js",
       "require": "./dist/cjs/server/index.js"
     },
+    "./shared": {
+      "import": "./dist/esm/shared/index.js",
+      "require": "./dist/cjs/shared/index.js"
+    },
     "./*": {
       "import": "./dist/esm/*",
       "require": "./dist/cjs/*"

src/client/index.test.ts renamed to src/client/client.test.ts

@@ -1,7 +1,7 @@
 /* eslint-disable @typescript-eslint/no-unused-vars */
 /* eslint-disable no-constant-binary-expression */
 /* eslint-disable @typescript-eslint/no-unused-expressions */
-import { Client } from "./index.js";
+import { Client } from "./client.js";
 import { z } from "zod";
 import {
   RequestSchema,