Added Bootstrap 5 support

Author: jamesmcroft

docs/templates/material/partials/head.tmpl.partial

@@ -4,15 +4,17 @@
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <title>{{#title}}{{title}}{{/title}}{{^title}}{{>partials/title}}{{/title}} {{#_appTitle}}| {{_appTitle}} {{/_appTitle}}</title>
-  <meta name="viewport" content="width=device-width">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <meta name="title" content="{{#title}}{{title}}{{/title}}{{^title}}{{>partials/title}}{{/title}} {{#_appTitle}}| {{_appTitle}} {{/_appTitle}}">
   <meta name="generator" content="docfx {{_docfxVersion}}">
   {{#_description}}<meta name="description" content="{{_description}}">{{/_description}}
   <link rel="shortcut icon" href="{{_rel}}{{{_appFaviconPath}}}{{^_appFaviconPath}}favicon.ico{{/_appFaviconPath}}">
   <link rel="stylesheet" href="{{_rel}}styles/docfx.vendor.css">
   <link rel="stylesheet" href="{{_rel}}styles/docfx.css">
+  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap-grid.min.css" rel="stylesheet" crossorigin="anonymous">
+  <link rel="stylesheet" href="https://pro.fontawesome.com/releases/v5.1.0/css/all.css" integrity="sha384-87DrmpqHRiY8hPLIr7ByqhPIywuSsjuQAfMXAE0sMUpY3BM7nXjf+mLIUSvhDArs" crossorigin="anonymous" />
   <link rel="stylesheet" href="{{_rel}}styles/main.css">
-  <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet"> 
+  <link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
   <meta property="docfx:navrel" content="{{_navRel}}">
   <meta property="docfx:tocrel" content="{{_tocRel}}">
   {{#_noindex}}<meta name="searchOption" content="noindex">{{/_noindex}}