example: add example for image input understanding

examples/images.ts

@@ -0,0 +1,38 @@
+#!/usr/bin/env -S npm run tsn -T
+
+import Anthropic from '@anthropic-ai/sdk';
+import fs from 'fs';
+import path from 'path';
+
+const client = new Anthropic(); // gets API Key from environment variable ANTHROPIC_API_KEY
+async function main() {
+  const filePath = path.join(__dirname, 'logo.png');
+  const buffer = fs.readFileSync(filePath);
+  const base64Image = buffer.toString('base64');
+  const result = await client.messages.create({
+    messages: [
+      {
+        role: 'user',
+        content: [
+          {
+            type: 'text',
+            text: 'What is in this image?',
+          },
+          {
+            type: 'image',
+            source: {
+              data: base64Image,
+              type: 'base64',
+              media_type: 'image/png',
+            },
+          },
+        ],
+      },
+    ],
+    model: 'claude-sonnet-4-20250514',
+    max_tokens: 1024,
+  });
+  console.dir(result);
+}
+
+main();