chore(docs): update logos, favicon, and README branding (heygen-com#272)

Replace old text-only wordmarks and complex favicon with new HyperFrames
brand assets featuring the gradient icon. Add dark/light logo switching
to README via GitHub's <picture> element.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jrusso1020

README.md

@@ -1,8 +1,16 @@
-# Hyperframes
-
-[![npm version](https://img.shields.io/npm/v/hyperframes.svg?style=flat)](https://www.npmjs.com/package/hyperframes)
-[![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
-[![Node.js](https://img.shields.io/badge/node-%3E%3D22-brightgreen)](https://nodejs.org)
+<p align="center">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="docs/logo/dark.svg">
+    <source media="(prefers-color-scheme: light)" srcset="docs/logo/light.svg">
+    <img alt="HyperFrames" src="docs/logo/light.svg" width="300">
+  </picture>
+</p>
+
+<p align="center">
+  <a href="https://www.npmjs.com/package/hyperframes"><img src="https://img.shields.io/npm/v/hyperframes.svg?style=flat" alt="npm version"></a>
+  <a href="LICENSE"><img src="https://img.shields.io/badge/license-Apache%202.0-blue.svg" alt="License"></a>
+  <a href="https://nodejs.org"><img src="https://img.shields.io/badge/node-%3E%3D22-brightgreen" alt="Node.js"></a>
+</p>
 
 **Write HTML. Render video. Built for agents.**