feat: add app shell (angular-material)

Add app shell built using angular-material and flex-layout. Refractor
code due to configuration changes.

Fixes #52

src/app/clients/clients.component.html

@@ -1,4 +1,4 @@
-<div class="fluid-container">
+<!-- <div class="fluid-container">
  <div class="container">
   <div class="card mt-5">
     <div class="card-header">
@@ -16,10 +16,8 @@
     </div>
     <div class="card-body">
 
-        <!--Table-->
         <table class="table table-hover table-responsive-md table-fixed">
 
-            <!--Table head-->
             <thead>
                 <tr>
                     <th>#</th>
@@ -31,9 +29,7 @@
 
                 </tr>
             </thead>
-            <!--Table head-->
 
-            <!--Table body-->
             <tbody>
                 <tr>
                     <th scope="row">4</th>
@@ -90,12 +86,10 @@
 
                 </tr>
             </tbody>
-            <!--Table body-->
 
         </table>
-        <!--Table-->
 
       </div>
     </div>
   </div>
-</div>
+</div> -->