✨(dimail) add reset password method

allow domain owner and admins to reset password for a mailbox
they manage. The request is sent to dimail, which responds with
a new randomly generated password. This new password is sent to
secondary email.

src/mail/mjml/new_mailbox.mjml

@@ -21,7 +21,7 @@
       <mj-section background-color="#f3f2fe" padding="0px 20px">
         <mj-column>
           <mj-text>{% trans "Email address: "%}<b>{{ mailbox_data.email }}</b></mj-text>
-          <mj-text>{% trans "Temporary password (to be modify on first login): "%}<b>{{ mailbox_data.password }}</b></mj-text>
+          <mj-text>{% trans "Temporary password (to be modified on first login): "%}<b>{{ mailbox_data.password }}</b></mj-text>
         </mj-column>
       </mj-section>
       <mj-section padding="0px 20px">

src/mail/mjml/reset_password.mjml

@@ -0,0 +1,43 @@
+<mjml>
+  <mj-include path="./partial/header.mjml" />
+
+  <mj-body mj-class="bg--blue-100">
+    <mj-wrapper css-class="wrapper" padding="0 40px 40px 40px">
+      <mj-section>
+        <mj-column>
+            <mj-image align="center" src="{% base64_static 'images/messagerie.png' %}" width="60px" height="60px" alt="{% trans 'La Messagerie' %}" />
+        </mj-column>
+      </mj-section>
+      <mj-section mj-class="bg--white-100" padding="0px 20px">
+        <mj-column>
+          <!-- Message -->
+          <mj-text font-size="30px"><b>{% trans "Your password has been reset" %}</b></mj-text>
+          <!-- Main Message -->
+          <mj-text>{% trans "Your password has been reset." %}</mj-text>
+          <mj-text>{% trans "Please find below your new login information: " %}</mj-text>
+        </mj-column>
+      </mj-section>
+      <mj-section background-color="#f3f2fe" padding="0px 20px">
+        <mj-column>
+          <mj-text>{% trans "Email address: "%}<b>{{ mailbox_data.email }}</b></mj-text>
+          <mj-text>{% trans "Temporary password (to be modified on first login): "%}<b>{{ mailbox_data.password }}</b></mj-text>
+        </mj-column>
+      </mj-section>
+      <mj-section padding="0px 20px">
+        <mj-column>
+          <mj-button background-color="#000091" color="white" href="{{ webmail_url }}">
+            {% trans "Go to La Messagerie" %}
+          </mj-button>
+          <!-- Signature -->
+          <mj-text>
+            <p>{% trans "Sincerely," %}</p>
+            <p>{% trans "La Suite Team" %}</p>
+          </mj-text>
+        </mj-column>
+      </mj-section>
+    </mj-wrapper>
+  </mj-body>
+
+  <mj-include path="./partial/footer.mjml" />
+</mjml>
+