chore: update .gitignore and add pytest settings

Remove unnecessary .vscode directory from .gitignore and add 
pytest configuration to .vscode/settings.json to enable 
testing with pytest in the project. This improves the 
development workflow by ensuring that pytest is the default 
testing framework.

.gitignore

@@ -1,5 +1,3 @@
-.vscode
-
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    "python.testing.pytestArgs": [
+        "src"
+    ],
+    "python.testing.unittestEnabled": false,
+    "python.testing.pytestEnabled": true
+}