Configure Vitest with @/ alias and v8 coverage

vitest.config.ts

@@ -0,0 +1,28 @@
+import { defineConfig } from "vitest/config";
+import path from "node:path";
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "./src"),
+      "@phase0": path.resolve(__dirname, "./scripts/phase-0"),
+    },
+  },
+  test: {
+    environment: "node",
+    globals: true,
+    passWithNoTests: true,
+    include: ["src/**/*.test.ts", "src/**/*.test.tsx"],
+    coverage: {
+      provider: "v8",
+      reporter: ["text", "json-summary", "lcov"],
+      include: ["src/**/*.ts", "src/**/*.tsx"],
+      exclude: [
+        "src/**/*.test.ts",
+        "src/**/*.test.tsx",
+        "src/**/types.ts",
+        "src/host-contract.ts",
+      ],
+    },
+  },
+});