add logo in README and try large logo

Author: shravanngoswamii

README.md

@@ -1,3 +1,11 @@
+<p align="center">
+  <picture>
+    <source media="(prefers-color-scheme: dark)" srcset="https://turinglang.org/assets/logo/turing-logo-dark.svg">
+    <img src="https://turinglang.org/assets/logo/turing-logo-light.svg" alt="Turing.jl logo" width="300">
+  </picture>
+</p>
+<p align="center"><i>Bayesian inference with probabilistic programming</i></p>
+
 # `Turing.jl` Website
 
 This repository contains the quarto source for the `Turing.jl` website. 

_brand.yml

@@ -1,4 +1,4 @@
 logo:
-  small:
+  large:
     light: assets/logo/turing-logo-light.svg
-    dark: assets/logo/turing-logo-dark.svg
+    dark: assets/logo/turing-logo-dark.svg

_includes/footer.html

@@ -78,4 +78,4 @@ <h5>
             </a>
         </div>
     </div>
-</footer>
+</footer>