build(docs): Add icons

Author: tony

doc/_static/img/icons/icon-128x128.png

@@ -0,0 +1,53 @@
+{
+  "name": "libtmux",
+  "short_name": "libtmux",
+  "description": "scripting library / orm for tmux",
+  "theme_color": "#2196f3",
+  "background_color": "#fff",
+  "display": "browser",
+  "Scope": "https://libtmux.git-pull.com/",
+  "start_url": "https://libtmux.git-pull.com/",
+  "icons": [
+    {
+      "src": "_static/img/icons/icon-72x72.png",
+      "sizes": "72x72",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-96x96.png",
+      "sizes": "96x96",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-128x128.png",
+      "sizes": "128x128",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-144x144.png",
+      "sizes": "144x144",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-152x152.png",
+      "sizes": "152x152",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-384x384.png",
+      "sizes": "384x384",
+      "type": "image/png"
+    },
+    {
+      "src": "_static/img/icons/icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "splash_pages": null
+}