🧪 Added Vitest configuration with coverage

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+    "recommendations": [
+        "esbenp.prettier-vscode",
+        "dbaeumer.vscode-eslint",
+        "streetsidesoftware.code-spell-checker",
+        "vitest.explorer",
+        "ms-vscode.vscode-typescript-next"
+    ]
+}

vitest.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config';
+export default defineConfig({
+  test: {
+    coverage: {
+      reporter: ['text', 'html', 'lcov'],
+      include: ['src/**/*.ts'],
+      exclude: ['src/**/*.test.ts', 'test/**'],
+    },
+  },
+});