TST: Skip tests requiring contextily in Monte Carlo plot tests

- Added pytest.importorskip for contextily in both integration and unit test files to ensure tests are only run if the required library is installed.

Author: C8H10O2

tests/integration/simulation/test_monte_carlo_plots_background.py

@@ -15,6 +15,10 @@
 
 plt.rcParams.update({"figure.max_open_warning": 0})
 
+pytest.importorskip(
+    "contextily", reason="This test requires contextily to be installed"
+)
+
 
 class MockMonteCarlo(MonteCarlo):
     """Create a mock class to test the method without running a real simulation.

tests/unit/simulation/test_monte_carlo_plots_background.py

@@ -13,6 +13,10 @@
 
 plt.rcParams.update({"figure.max_open_warning": 0})
 
+pytest.importorskip(
+    "contextily", reason="This test requires contextily to be installed"
+)
+
 
 class MockMonteCarlo(MonteCarlo):
     """Create a mock class to test the method without running a real simulation.