Add logo

Fixes #268

Author: behdad

README.md

@@ -1,8 +1,13 @@
+## uharfbuzz
+
+<div align="center">
+<p><img src="logo.png" alt="uharfbuzz Logo" width="256" align="center"/></p>
+
 [![Build + Deploy](https://github.com/harfbuzz/uharfbuzz/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/harfbuzz/uharfbuzz/actions/workflows/ci.yml)
 [![PyPI](https://img.shields.io/pypi/v/uharfbuzz.svg)](https://pypi.org/project/uharfbuzz)
 [![Documentation Status](https://readthedocs.org/projects/uharfbuzz/badge/?version=stable)](https://uharfbuzz.readthedocs.io)
 
-## uharfbuzz
+</div>
 
 Streamlined Cython bindings for the [HarfBuzz][hb] shaping engine.