Add a simple script to iterate through all elements and change the text.

Prompt:

```
can you create a chrome extension that can read text from all elements in html
and modify them?
```

extension/content.js

@@ -0,0 +1,21 @@
+// content.js
+
+// Get all the elements on the page
+let elements = document.getElementsByTagName("*");
+
+// Iterate through the elements and modify their text
+for (let i = 0; i < elements.length; i++) {
+  let element = elements[i];
+
+  // Only modify elements with text content
+  if (element.innerText.length > 0) {
+    let text = element.innerText;
+
+    // Modify the text
+    text = text.toUpperCase();
+
+    // Write the modified text back to the element
+    element.innerText = text;
+  }
+}
+