feat: add centers view page (general tab) (#782)

Fixes: #218

src/app/centers/centers.component.scss

@@ -5,6 +5,13 @@
   .search-button{
     min-width: 30px;
     margin: 4px;
-    
+  }
+}
+
+table {
+  width: 100%;
+
+  .select-row:hover {
+    cursor: pointer;
   }
 }