[IMP] estate: add kanban view with grouping and conditional fields

Add a kanban view to give users a better visual overview of properties.  The view groups properties by type to keep things organized and shows important price details only when they are relevant.

- Add kanban to the property action view_mode.
- Create a kanban view showing property name and tags.
- Show 'best price' only when an offer exists and 'selling price' only when an offer is accepted.
- Group properties by type by default.
- Disable the drag-and-drop feature for kanban columns.

Author: karimgamaleldin

estate/views/estate_property_views.xml

@@ -99,10 +99,39 @@
         </field>
     </record>
 
+    <record id="estate_property_view_kanban" model="ir.ui.view">
+        <field name="name">estate.property.kanban</field>
+        <field name="model">estate.property</field>
+        <field name="arch" type="xml">
+            <kanban string="Properties" default_group_by="property_type_id" records_draggable="False" groups_draggable="False">
+                <templates>
+                    <t t-name="card">
+                      <field name="state" invisible="1"/>
+                      <div>
+                        <b><field name="name"/></b>
+                      </div>
+                      <div>
+                        <strong>Expected Price: </strong><field name="expected_price" string="Expected Price"/>
+                      </div>
+                      <div t-if="record.state.raw_value == 'offer_received'">
+                        <strong>Best Offer: </strong><field name="best_offer"/>
+                      </div>
+                      <div t-if="record.state.raw_value == 'offer_accepted'">
+                        <strong>Selling Price: </strong><field name="selling_price"/>
+                      </div>
+                      <div>
+                        <field name="tag_ids" widget="many2many_tags" options="{'color_field': 'color'}"/>
+                      </div>
+                    </t>
+                </templates>
+            </kanban>
+        </field>
+    </record>
+
     <record id="estate_property_action" model="ir.actions.act_window">
         <field name="name">Properties</field>
         <field name="res_model">estate.property</field>
-        <field name="view_mode">list,form</field>
+        <field name="view_mode">list,form,kanban</field>
         <field name="context">{'search_default_available': 1}</field>
         <field name="help" type="html">
           <p class="o_view_nocontent_smiling_face">