test: root vitest projects across packages

vitest.config.ts

@@ -0,0 +1,28 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+    test: {
+        projects: [
+            {
+                test: {
+                    name: 'unit',
+                    include: ['packages/*/test/unit/**/*.test.ts']
+                }
+            },
+            {
+                test: {
+                    name: 'integration',
+                    include: ['packages/*/test/integration/**/*.test.ts'],
+                    testTimeout: 120_000,
+                    hookTimeout: 240_000
+                }
+            }
+        ],
+        coverage: {
+            provider: 'v8',
+            include: ['packages/*/src/**'],
+            exclude: ['packages/*/src/index.ts'],
+            thresholds: { lines: 90, functions: 90 }
+        }
+    }
+})