feat: OPNsense integration and widget (#3424)

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>
Co-authored-by: deepsource-io[bot] <42547082+deepsource-io[bot]@users.noreply.github.com>

packages/widgets/src/firewall/firewall.module.css

@@ -0,0 +1,7 @@
+[data-mantine-color-scheme="light"] .card {
+  background-color: var(--mantine-color-gray-1);
+}
+
+[data-mantine-color-scheme="dark"] .card {
+  background-color: var(--mantine-color-dark-7);
+}