docs: better PWA, more responsive, better description

docs/source/manifest.json

@@ -1,6 +1,7 @@
 {
   "short_name": "LiquidJS",
   "name": "LiquidJS",
+  "description": "A simple, expressive and safe Shopify / Github Pages compatible template engine in pure JavaScript.",
   "icons": [
     {
       "src": "/icon/apple-touch-icon-57x57.png",
@@ -23,6 +24,33 @@
       "sizes": "512x512"
     }
   ],
+  "shortcuts" : [
+    {
+      "name": "Tutorials",
+      "url": "/tutorials/intro-to-liquid.html",
+      "description": "A set of articles describing how to use LiquidJS"
+    },
+    {
+      "name": "Tags",
+      "url": "/tags/overview.html",
+      "description": "Description and demo for each Liquid tag"
+    },
+    {
+      "name": "Filters",
+      "url": "/filters/overview.html",
+      "description": "Description and demo for each Liquid filter"
+    },
+    {
+      "name": "Playground",
+      "url": "/playground.html",
+      "description": "An online code editor to try out and share Liquid templates"
+    },
+    {
+      "name": "API",
+      "url": "/api/classes/liquid_.liquid.html",
+      "description": "TypeScript doc for LiquidJS classes and interfaces"
+    }
+  ],
   "start_url": "/",
   "display": "standalone",
   "theme_color": "#0f83ce",