[IMP] account: add new digest tips

PURPOSE

Review the tips and digest layout design to make sure they have a WOW effect
and increase trial conversion/retention.

SPECIFICATIONS

“No need to print, put in an envelop and post your invoices”
See code for specifications.

LINKS

Task ID-2274264
COM PR: odoo/odoo#53580
ENT PR: odoo/enterprise#1139

X-original-commit: 58bcc8c3c509df9e3774369ac1a626d528eba598

addons/account/data/digest_data.xml

@@ -5,4 +5,19 @@
             <field name="kpi_account_total_revenue">True</field>
         </record>
     </data>
+
+    <data>
+        <record id="digest_tip_account_0" model="digest.tip">
+            <field name="name">Tip: No need to print, put in an envelop and post your invoices</field>
+            <field name="sequence">700</field>
+            <field name="group_id" ref="account.group_account_invoice" />
+            <field name="tip_description" type="html">
+<div>
+    <p class="tip_title">Tip: No need to print, put in an envelop and post your invoices</p>
+    <p class="tip_content">Use the “<i>Send by Post</i>” option to post invoices automatically. For the cost of a local stamp, we do all the manual work: your invoice will be printed in the right country, put in an envelop and sent by snail mail. Use this feature from the list view to post hundreds of invoices in bulk.</p>
+    <img src="/account/static/src/img/invoice-stamps.png" class="illustration_border" />
+</div>
+            </field>
+        </record>
+    </data>
 </odoo>