Add favicon.

Author: njhenry

site/index.html

@@ -4,6 +4,8 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>OpenPOIs - Point of Interest Explorer</title>
+    <link rel="icon" type="image/x-icon" href="/src/assets/favicon.ico" />
+    <link rel="icon" type="image/png" sizes="32x32" href="/src/assets/favicon-32x32.png" />
     <link
       rel="stylesheet"
       href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,700,0,0&icon_names=my_location"