feat(vscode): add Python environment and analysis settings

- Configure `.env` file for environment variables
- Add `src` to Python analysis extra paths for better IntelliSense

Signed-off-by: Max P. <Mail@MPassarello.de>

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "python.envFile": "${workspaceFolder}/.env",
+    "python.analysis.extraPaths": [
+        "src"
+    ]
+}