vscode settings: Add pytest setup and other good defaults.

Author: cyberw

.vscode/settings.json

@@ -0,0 +1,20 @@
+{
+     "[python]": {
+        "editor.formatOnSave": true,
+        "editor.codeActionsOnSave": {
+            "source.fixAll": "explicit",
+            "source.organizeImports": "explicit"
+        },
+        "editor.defaultFormatter": "charliermarsh.ruff"
+    },
+    "python.testing.pytestArgs": [
+        "locustfile.py"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true,
+    "files.exclude": {
+        ".pytest_cache/**/*": true,
+        "**/__pycache__": true,
+        "**/.pytest_cache": true
+    },
+}