[WEB-3707] pytest based test suite for apiserver (#7010)

* pytest bases tests for apiserver

* Trimmed spaces

* Updated .gitignore for pytest local files

apiserver/pytest.ini

@@ -0,0 +1,17 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = plane.settings.test
+python_files = test_*.py
+python_classes = Test*
+python_functions = test_*
+
+markers =
+    unit: Unit tests for models, serializers, and utility functions
+    contract: Contract tests for API endpoints
+    smoke: Smoke tests for critical functionality
+    slow: Tests that are slow and might be skipped in some contexts
+
+addopts = 
+    --strict-markers
+    --reuse-db
+    --nomigrations
+    -vs