chore(vscode): add recommendation extensions

Author: gretmn102

.vscode/extensions.json

@@ -0,0 +1,20 @@
+{
+	// 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": [
+		// general
+		"EditorConfig.EditorConfig",
+		"ldez.ignore-files",
+		// markdown
+		"DavidAnson.vscode-markdownlint",
+		"fcrespo82.markdown-table-formatter",
+		"bierner.markdown-mermaid",
+		"bpruitt-goddard.mermaid-markdown-syntax-highlighting",
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": [
+
+	]
+}