Implement WHMCS Addon Dashboard with API for stats and integrate billing provider logic

integrations/whmcs/modules/addons/hexagamecloud/templates/reconciliation.tpl

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+<div class="panel panel-default">
+  <div class="panel-heading">
+    <h3 class="panel-title">Reconciliation</h3>
+  </div>
+  <div class="panel-body">
+    <p>
+      <a href="{{modulelink}}" class="btn btn-default">Dashboard</a>
+      <a href="{{modulelink}}&action=reconciliation&run=1&dry=1" class="btn btn-default">Dry run</a>
+      <a href="{{modulelink}}&action=reconciliation&run=1&repair=1" class="btn btn-warning">Live + auto-repair</a>
+    </p>
+
+    {{reconciliation.result}}
+
+    <h4>Recent runs</h4>
+    <table class="table table-bordered table-condensed">
+      <thead>
+        <tr>
+          <th>Run ID</th>
+          <th>Mode</th>
+          <th>Issues</th>
+          <th>Created</th>
+        </tr>
+      </thead>
+      <tbody>
+        {{reconciliation.rows}}
+      </tbody>
+    </table>
+  </div>
+</div>