Initialize v18 branch

Rename *_usability modules to *_usability_akretion

pos_usability_akretion/models/product.py

@@ -0,0 +1,13 @@
+# Copyright 2017-2021 Akretion France (http://www.akretion.com/)
+# @author: Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    available_in_pos = fields.Boolean(tracking=True, default=True)
+    to_weight = fields.Boolean(tracking=True)
+    pos_categ_id = fields.Many2one(tracking=True)