Remove commented-out code and update configurations

Deleted unused or commented-out code across multiple files to improve clarity and maintainability. Updated `kv_namespaces` in `wrangler.toml` and specified the package manager in `package.json`. Add placeholder values for development kv stores.

workers/email/email_worker.js

@@ -17,7 +17,6 @@ export default class EmailWorker extends WorkerEntrypoint {
       addr: "contact@seemueller.io",
     });
     console.log("Recipient:", to);
-    // msg.setRecipient(to);
     msg.setRecipient(to);
     msg.setSubject("New Contact Request: Website");
     msg.addMessage({

workers/site/sdk/assistant-sdk.ts

@@ -27,8 +27,6 @@ export class AssistantSdk {
       tools
         .map((tool) => {
           switch (tool) {
-            // case "user-attachments": return "### Attachments\nUser supplied attachments are normalized to text and will have this header (# Attachment:...) in the message.";
-            // case "web-search": return "### Web Search\nResults are optionally available in 'Live Search'.";
             default:
               return `- ${tool}`;
           }