docs(sphinx): Add app icons, manifest, favicon

Author: tony

docs/_templates/layout.html

@@ -1,5 +1,39 @@
 {% extends "!layout.html" %}
 {%- block extrahead %}
   {{ super() }}
+  {%- if theme_show_meta_manifest_tag == true %}
   <link rel="manifest" href="/manifest.json">
+  {% endif -%}
+  {%- if theme_show_meta_og_tags == true %}
+  <meta name="description" content="vcs abstraction layer">
+
+  <!-- Open Graph / Facebook -->
+  <meta property="og:type" content="website">
+  <meta property="og:url" content="{{ theme_project_url }}/">
+  <meta property="og:title" content="libvcs">
+  <meta property="og:description" content="vcs abstraction layer">
+  <meta property="og:image" itemprop="image" content="{{ theme_project_url }}/_static/img/icons/icon-192x192.png">
+
+  <!-- Twitter -->
+  <meta property="twitter:card" content="summary_large_image">
+  <meta property="twitter:url" content="{{ theme_project_url }} ">
+  <meta property="twitter:title" content="libvcs">
+  <meta property="twitter:description" content="vcs abstraction layer">
+  <meta property="twitter:image" content="{{ theme_project_url }}/_static/img/icons/icon-512x512.png">
+  {% endif -%}
+  {%- if theme_show_meta_app_icon_tags == true %}
+  <meta name="theme-color" content="#ffffff">
+  <meta name="application-name" content="libvcs">
+  
+  <link rel="shortcut icon" href="/_static/favicon.ico">
+  <link rel="icon" type="image/png" sizes="512x512" href="/_static/img/icons/icon-512x512.png">
+  <link rel="icon" type="image/png" sizes="32x32" href="/_static/img/icons/icon-32x32.png">
+  <link rel="icon" type="image/png" sizes="16x16" href="/_static/img/icons/icon-16x16.png">
+  
+  <!-- Apple -->
+  <meta name="apple-mobile-web-app-title" content="libvcs">
+  
+  <link rel="apple-touch-icon" sizes="192x192" href="/_static/img/icons/icon-192x192.png">
+  <link rel="mask-icon" href="/_static/img/libvcs.svg" color="grey">
+  {% endif -%}
 {% endblock %}

docs/conf.py

@@ -73,6 +73,10 @@ def setup(app):
     'github_banner': True,
     'projects': alagitpull.projects,
     'project_name': about['__title__'],
+    'project_url': 'https://libvcs.git-pull.com',
+    'show_meta_manifest_tag': True,
+    'show_meta_og_tags': True,
+    'show_meta_app_icon_tags': True,
 }
 html_sidebars = {
     '**': [