Add resolution manager and unsupported flags (#2124)

* Add unsupported reason flags

* Restore test_network.py

* Add Resolution manager object

* fix import

tests/resolution/test_resolution_manager.py

@@ -0,0 +1,14 @@
+"""Tests for resolution manager."""
+
+
+from supervisor.const import UnsupportedReason
+from supervisor.coresys import CoreSys
+
+
+def test_properies(coresys: CoreSys):
+    """Test resolution manager properties."""
+
+    assert coresys.core.supported
+
+    coresys.resolution.unsupported = UnsupportedReason.OS
+    assert not coresys.core.supported