Add settings and extension recommendations (#139)

- Added recommended settings for the Pylance and Pyright extensions
- Enabled pytest and debugging support in configuration
- Reformatted code with Prettier
---------
Co-authored-by: Chris <git@nootch.de>

.vscode/extensions.json

@@ -0,0 +1,14 @@
+{
+  "recommendations": [
+    //python
+    "ms-python.python",
+    "ms-python.debugpy",
+    "charliermarsh.ruff",
+    "ms-python.mypy-type-checker",
+
+    // misc
+    "swellaby.workspace-config-plus", // allows user and shared settings
+    "christian-kohler.path-intellisense",
+    "esbenp.prettier-vscode"
+  ]
+}

.vscode/settings.shared.json

@@ -0,0 +1,13 @@
+{
+  "[python]": {
+    "editor.defaultFormatter": "charliermarsh.ruff"
+  },
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.defaultFoldingRangeProvider": "charliermarsh.ruff",
+  "editor.formatOnSave": true,
+  "python.analysis.autoImportCompletions": true,
+  "mypy-type-checker.importStrategy": "fromEnvironment",
+  "python.testing.pytestArgs": [],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
+}