Add: VSCode settings

Enabling type checking with Pylance.

.gitignore

@@ -1,5 +1,3 @@
-.vscode/
-
 __pycache__/
 venv/
 .venv/

.vscode/extensions.json

@@ -0,0 +1,6 @@
+{
+    "recommendations": [
+        "ms-python.python",
+        "ms-python.vscode-pylance"
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,22 @@
+{
+    // Pylance の Type Checking を有効化
+    "python.languageServer": "Pylance",
+    "python.analysis.typeCheckingMode": "strict",
+    // Pylance の Type Checking のうち、いくつかのエラー報告を抑制する
+    "python.analysis.diagnosticSeverityOverrides": {
+        "reportConstantRedefinition": "none",
+        "reportGeneralTypeIssues": "warning",
+        "reportMissingParameterType": "warning",
+        "reportMissingTypeStubs": "none",
+        "reportPrivateImportUsage": "none",
+        "reportPrivateUsage": "warning",
+        "reportShadowedImports": "none",
+        "reportUnnecessaryComparison": "none",
+        "reportUnknownArgumentType": "none",
+        "reportUnknownMemberType": "none",
+        "reportUnknownParameterType": "warning",
+        "reportUnknownVariableType": "none",
+        "reportUnusedFunction": "none",
+        "reportUnusedVariable": "information",
+    },
+}