[IMP] survey: add a category on surveys to allow filtering them

Purpose of this commit is to add a category selection field on surveys. It
will allow to filter / select surveys according to their category and their
main use.

This commit is linked to task ID 1911586 and PR #28986.

addons/survey/models/survey_survey.py

@@ -31,6 +31,10 @@ class Survey(models.Model):
     stage_id = fields.Many2one('survey.stage', string="Stage", default=_default_stage,
                                ondelete="restrict", copy=False, group_expand='_read_group_stage_ids')
     is_closed = fields.Boolean("Is closed", related='stage_id.closed', readonly=True)
+    category = fields.Selection([
+        ('default', 'Generic Survey')], string='Category',
+        default='default', required=True,
+        help='Category is used to know in which context the survey is used. Various apps may define their own categories when they use survey like jobs recruitment or employee appraisal surveys.')
     # content
     page_ids = fields.One2many('survey.page', 'survey_id', string='Pages', copy=True)
     user_input_ids = fields.One2many('survey.user_input', 'survey_id', string='User responses', readonly=True, groups='survey.group_survey_user')

addons/survey/views/survey_survey_views.xml

@@ -33,9 +33,14 @@
                         <h1><field name="title" placeholder="Survey Title"/></h1>
                     </div>
                     <group>
-                        <field name="access_mode"/>
-                        <field name="quizz_mode"/>
-                        <field name="users_can_go_back"/>
+                        <group>
+                            <field name="access_mode"/>
+                            <field name="users_can_go_back"/>
+                        </group>
+                        <group>
+                            <field name="category" invisible="1"/>
+                            <field name="quizz_mode"/>
+                        </group>
                     </group>
                     <group string="Edit Pages and Questions">
                         <field name="page_ids" mode="tree" context="{'default_survey_id': active_id}" nolabel="1">
@@ -145,6 +150,9 @@
                 <filter string="Upcoming Activities" name="activities_upcoming_all"
                     domain="[('activity_ids.date_deadline', '&gt;', context_today().strftime('%Y-%m-%d'))
                     ]"/>
+                <group expand="0" string="Group By">
+                    <filter string="Category" name="groupby_category" context="{'group_by': 'category'}"/>
+                </group>
             </search>
         </field>
     </record>