Feature/adv tot charge (#402)

fixes #338 

The goal of this change is to add the widget to setting the `tot_charge` for pw calculation. It has the same structure and logic as smearing and kpoints distance setting widgets, we therefore bundle these three into the `AdvancedSettings` widget for parameters that can be overridden by users.

---------
Co-authored-by: Jusong Yu <jusong.yeu@gmail.com>

aiidalab_qe/app/report.py

@@ -65,6 +65,8 @@ def _generate_report_dict(builder_parameters: dict):
         yield "degauss", builder_parameters["degauss"]
         yield "smearing", builder_parameters["smearing"]
 
+    yield "tot_charge", builder_parameters["tot_charge"]
+
 
 def _generate_report_html(report):
     """Read from the bulider parameters and generate a html for reporting

aiidalab_qe/app/static/workflow_summary.jinja

@@ -92,6 +92,10 @@
         <td>{{ nscf_kpoints_distance }} &#8491;<sup>-1</sup></td>
       </tr>
       {% endif %}
+      <tr>
+        <td>Total Charge</td>
+        <td>{{ tot_charge }}</td>
+      </tr>
     </table>
   </div>
 </div>