Refactor dashboard templates

Previously the structure was

```
dashboard.html
|_ today.html
   |_ some random html
   |_ a few things split into partials
```

This commit simplifies the structure to just be:

```
dashboard.html
|_ partial
|_ partial
|_ …
```

app/templates/views/dashboard/dashboard.html

@@ -1,5 +1,10 @@
 {% extends "withnav_template.html" %}
 
+{% from "components/big-number.html" import big_number, big_number_with_status %}
+{% from "components/show-more.html" import show_more %}
+{% from "components/message-count-label.html" import message_count_label %}
+{% from "components/table.html" import list_table, field, right_aligned_field_heading, hidden_field_heading %}
+
 {% block page_title %}
   {{ current_service.name }} – GOV.UK Notify
 {% endblock %}
@@ -23,7 +28,51 @@
     <h2 class="heading-medium">
       In the last 7 days
     </h2>
-    {% include 'views/dashboard/today.html' %}
+
+    <div
+      data-module="update-content"
+      data-resource="{{url_for(".service_dashboard_updates", service_id=current_service.id)}}"
+      data-key="today"
+      data-interval-seconds="2"
+      aria-live="polite"
+    >
+      <div class="grid-row">
+        {% include 'views/dashboard/_totals.html' %}
+        <div class="column-whole">
+          {{ show_more(
+            url_for('.weekly', service_id=current_service.id),
+            'Compare to previous weeks'
+          ) }}
+        </div>
+      </div>
+
+      {% if template_statistics|length %}
+        {% include 'views/dashboard/template-statistics.html' %}
+        {{ show_more(
+          url_for('.template_history', service_id=current_service.id),
+          'See all templates used this year'
+        ) }}
+      {% endif %}
+
+      {% if jobs %}
+        {% include 'views/dashboard/_jobs.html' %}
+        {{ show_more(
+          url_for('.view_jobs', service_id=current_service.id),
+          'See all uploaded files'
+        ) }}
+      {% endif %}
+
+      {% if current_user.has_permissions(['manage_settings'], admin_override=True) %}
+        <h2 class='heading-medium'>This year</h2>
+        {% include 'views/dashboard/_jobs.html' %}
+        {{ show_more(
+          url_for(".usage", service_id=current_service['id']),
+          'See usage breakdown'
+        ) }}
+      {% endif %}
+
+    </div>
+
 
   </div>