chore(repo): add vscode extensions and settings

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+    "recommendations": [
+        "ms-dotnettools.csharp",
+        "ms-dotnettools.vscodeintellicode-csharp",
+        "csharpier.csharpier-vscode",
+        "patcx.vscode-nuget-gallery",
+        "vasubasraj.flashpost"
+    ]
+}

.vscode/settings.json

@@ -1,3 +1,11 @@
 {
-    "dotnet.defaultSolution": "ZenithInfo.sln"
+    "dotnet.defaultSolution": "ZenithInfo.sln",
+    "[csharp]": {
+        "editor.defaultFormatter": "csharpier.csharpier-vscode",
+        "editor.formatOnSave": true,
+        "editor.formatOnSaveMode": "file"
+    },
+    "files.associations": {
+        "*.json": "jsonc"
+    }
 }