added favicon

public/favicon.svg

@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-label="xsltools favicon" width="64" height="64"><metadata><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"><rdf:Description><dc:creator>RealFaviconGenerator</dc:creator><dc:source>https://realfavicongenerator.net</dc:source></rdf:Description></rdf:RDF></metadata><defs>
+    <linearGradient id="xsl-bg" x1="8" y1="5" x2="56" y2="59" gradientUnits="userSpaceOnUse">
+      <stop offset="0" stop-color="#6d5cff"></stop>
+      <stop offset="1" stop-color="#18224d"></stop>
+    </linearGradient>
+    <filter id="soft-shadow" x="-20%" y="-20%" width="140%" height="140%">
+      <feDropShadow dx="0" dy="2" stdDeviation="1.4" flood-color="#060b24" flood-opacity="0.35"></feDropShadow>
+    </filter>
+  </defs><rect width="64" height="64" rx="14" fill="url(#xsl-bg)"></rect><g filter="url(#soft-shadow)" fill="none" stroke-linecap="round" stroke-linejoin="round">
+    <path d="M20 29l-9 7 9 7" stroke="#ffffff" stroke-width="5"></path>
+    <path d="M44 29l9 7-9 7" stroke="#ffffff" stroke-width="5"></path>
+    <path d="M28 45l8-22" stroke="#ffffff" stroke-width="5"></path>
+  </g><style>@media (prefers-color-scheme: light) { :root { filter: none; } }
+@media (prefers-color-scheme: dark) { :root { filter: none; } }
+</style></svg>

public/site.webmanifest

@@ -0,0 +1,21 @@
+{
+  "name": "XSLTools",
+  "short_name": "XSLTools",
+  "icons": [
+    {
+      "src": "/web-app-manifest-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "/web-app-manifest-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ],
+  "theme_color": "#ffffff",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}