Configure recommended extensions for VS Code (#297)

- Include list of extension recommendations for linting/formatting tools

.vscode/extensions.json

@@ -0,0 +1,17 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"ms-python.black-formatter",
+		"dbaeumer.vscode-eslint",
+		"ms-python.flake8",
+		"ms-python.isort",
+		"ms-python.mypy-type-checker",
+		"esbenp.prettier-vscode",
+		"ms-python.python"
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": []
+}