Added icons and banner

Added a jellyfin inspired icon, and a banner to the README.md

data/static/browserconfig.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#603cba</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

data/static/safari-pinned-tab.svg

@@ -0,0 +1 @@
+<svg version="1" xmlns="http://www.w3.org/2000/svg" width="682.667" height="682.667" viewBox="0 0 512.000000 512.000000"><path d="M246 23.7c-13.9 2-30 8.6-40.6 16.6-20.2 15.4-32.5 40-32.5 65.5 0 38.8 24.2 70.7 61.9 81.4 11.1 3.2 31.4 3.1 42.7-.1 47.8-13.4 73-62.2 56.5-109.5-7.8-22.5-27.9-42.1-51.5-50-10.6-3.6-26.4-5.3-36.5-3.9zM235.5 205.6c-37.7 6.8-73.7 27.7-106.2 61.8-31.6 33.1-54.2 73.1-62.4 110.8-3 13.3-3.2 35.7-.5 45.8 5.6 21.2 20.1 36.8 43.4 46.9 9.2 3.9 21.4 7.8 30.7 9.6 10 1.9 26.1 4.5 32.5 5.1 4.1.4 8.9.8 10.5 1 25.3 2.5 85.7 2.4 107-.1 1.7-.2 5.7-.7 9-1 6.8-.7 11.2-1.2 17-1.9 34.7-4.4 70.3-13.2 90.8-22.4 17.8-8.1 30.7-18.6 35.4-28.8 5.8-12.6 6.6-36.1 1.9-56.4-5-22-16.8-48.3-31.5-70.5-33.6-50.8-80.8-87-128.1-98.2-13.3-3.1-37.1-3.9-49.5-1.7z"/></svg>

data/static/site.webmanifest

@@ -0,0 +1,19 @@
+{
+    "name": "jf-accounts",
+    "short_name": "jf-accounts",
+    "icons": [
+        {
+            "src": "/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/android-chrome-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}