[ADD] helpdesk_ticket_deadline: add a manual deadline on tickets

This module adds a simple, manually filled ``date_deadline``
Date field, tracked in the chatter, with an overdue flag,
a red kanban decoration and search filters (overdue, due
today, group by deadline).

helpdesk_ticket_deadline/__manifest__.py

@@ -0,0 +1,23 @@
+# Copyright 2026 Quentin Mondot
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "helpdesk_ticket_deadline",
+    "version": "18.0.1.0.0",
+    "author": "Elabore",
+    "website": "https://elabore.coop",
+    "maintainer": "Quentin Mondot",
+    "license": "AGPL-3",
+    "category": "Tools",
+    "summary": "Add a manually filled deadline date on helpdesk tickets.",
+    # any module necessary for this one to work correctly
+    "depends": [
+        "helpdesk_mgmt",
+    ],
+    "data": [
+        "views/helpdesk_ticket_views.xml",
+    ],
+    "installable": True,
+    "auto_install": False,
+    "application": False,
+}