chore(repo): baseline du fork input-remapper (upstream v2.2.1)

Le dépôt ne contenait que README.md ; ajout de l'intégralité du code
fonctionnel du fork comme socle stable de la branche de release.
L'état runtime d'orchestration (.ideai/) est exclu du suivi.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/system/test_numlockx.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# input-remapper - GUI for device specific keyboard mappings
+# Copyright (C) 2025 sezanzeb <b8x45ygc9@mozmail.com>
+#
+# This file is part of input-remapper.
+#
+# input-remapper is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# input-remapper is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with input-remapper.  If not, see <https://www.gnu.org/licenses/>.
+
+
+import unittest
+
+from inputremapper.injection.numlock import is_numlock_on, set_numlock, ensure_numlock
+from tests.lib.test_setup import test_setup
+
+
+@test_setup
+class TestNumlock(unittest.TestCase):
+    def test_numlock(self):
+        before = is_numlock_on()
+
+        set_numlock(not before)  # should change
+        self.assertEqual(not before, is_numlock_on())
+
+        @ensure_numlock
+        def wrapped_1():
+            set_numlock(not is_numlock_on())
+
+        @ensure_numlock
+        def wrapped_2():
+            pass
+
+        # should not change
+        wrapped_1()
+        self.assertEqual(not before, is_numlock_on())
+        wrapped_2()
+        self.assertEqual(not before, is_numlock_on())
+
+        # toggle one more time to restore the previous configuration
+        set_numlock(before)
+        self.assertEqual(before, is_numlock_on())
+
+
+if __name__ == "__main__":
+    unittest.main()