SEO Logo and favicons (#840)

* Improve home icon

* Rename main logo

* Remove unused small logo and loading animation

* Favicon and logo handling

Add 192x192 PNG favicon, move theme images to root of output directory

* Add sitemap to robots.txt

* Use realfavicongenerator.net for favicons (except webmanifest)

* Add webmanifest

* Add missing quotes

Author: Simran-B

site/config/_default/config.yaml

@@ -11,22 +11,22 @@ disableKinds: # Switch off tags and categories
 module:
   mounts:
     - source: "themes/arangodb-docs-theme/images"
-      target: "static/images"
-    
+      target: "content"
+
     - source: "content/images"
       target: "assets/images"
 
     - source: "static"
       target: "static"
 
-# Version folders can be ignored temporarily for faster local builds
-# of a single version (here: 3.12)
     - source: content
       target: content
-      excludeFiles:
-#       - arangodb/3.10/*
-#       - arangodb/3.11/*
-#       - arangodb/4.0/*
+      # Version folders can be ignored temporarily for faster local builds
+      # of a single version (here: 3.12)
+      #excludeFiles:
+      #- arangodb/3.10/*
+      #- arangodb/3.11/*
+      #- arangodb/4.0/*
 
     - source: content/arangodb/3.12
       target: content/arangodb/stable

site/themes/arangodb-docs-theme/images/logo_main.png renamed to site/themes/arangodb-docs-theme/images/Arango_logo.png

@@ -0,0 +1,21 @@
+{
+  "name": "Arango Documentation",
+  "short_name": "Arango Docs",
+  "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": "#044926",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}