PWA + test: manifest, icon, live-search test (were left uncommitted)

static/manifest.webmanifest

@@ -0,0 +1,10 @@
+{
+  "name": "ani-web",
+  "short_name": "ani-web",
+  "start_url": "./",
+  "scope": "./",
+  "display": "standalone",
+  "background_color": "#0e0f13",
+  "theme_color": "#0e0f13",
+  "icons": [{ "src": "icon.svg", "sizes": "any", "type": "image/svg+xml" }]
+}