feat: add contextual note field to sale order

sale_order_contextual/__init__.py

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+from . import models

sale_order_contextual/__manifest__.py

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+{
+    'name': 'Sale Order Contextual Note',
+    'version': '16.0.1.0.0',
+    'category': 'Sales',
+    'summary': 'Adds a contextual note field to sale orders',
+    'author': 'DomusLavila',
+    'depends': ['sale_management'],
+    'data': [
+        'views/sale_order_contextual_view.xml',
+    ],
+    'installable': True,
+    'auto_install': False,
+    'license': 'OPL-1',
+}

sale_order_contextual/models/__init__.py

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+from . import sale_order_contextual

sale_order_contextual/models/sale_order_contextual.py

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+from odoo import fields, models
+
+
+class SaleOrderContextual(models.Model):
+    _inherit = 'sale.order'
+
+    contextual_note = fields.Text(
+        string='Contextuele opmerking',
+    )

sale_order_contextual/views/sale_order_contextual_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="sale_order_contextual_view_form" model="ir.ui.view">
+        <field name="name">sale.order.contextual.note.form</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//notebook" position="inside">
+                <page string="Contextual" name="contextual_note_page">
+                    <field name="contextual_note" nolabel="1"/>
+                </page>
+            </xpath>
+        </field>
+    </record>
+</odoo>