implemented lato font, reorganized CSS, link-ified navbar-brand

lib/bones73k_web/templates/layout/_navbar.html.eex

@@ -1,10 +1,10 @@
 <nav class="navbar navbar-expand-lg navbar-light bg-light">
   <div class="container">
 
-    <a class="navbar-brand" href="#">
+    <%= link to: Routes.page_path(@conn, :index), class: "navbar-brand" do %>
       <%= icon_div @conn, "fas-skull-crossbones", class: "icon baseline" %>
       Bones73k
-    </a>
+    <% end %>
 
     <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
       <span class="navbar-toggler-icon"></span>