Use vitest workspace to run all the tests (#3448)

Co-authored-by: Mark Cowlishaw <markcowl@microsoft.com>

package.json

@@ -28,9 +28,9 @@
     "purge": "rimraf --glob \"packages/*/node_modules/\"",
     "regen-docs": "pnpm -r --parallel --aggregate-output --reporter=append-only run regen-docs",
     "regen-samples": "pnpm -r run regen-samples",
-    "test:ci": "pnpm -r --aggregate-output --reporter=append-only --sequential test:ci",
+    "test": "vitest run",
+    "test:ci": "vitest run  --coverage --reporter=junit --reporter=default",
     "test:e2e": "pnpm -r run test:e2e",
-    "test": "pnpm -r --aggregate-output --reporter=append-only run test",
     "update-latest-docs": "pnpm -r run update-latest-docs",
     "watch": "tsc --build ./tsconfig.ws.json --watch",
     "sync-labels": "tsx ./eng/common/scripts/labels/sync-labels.ts  --config ./eng/common/config/labels.ts"
@@ -46,6 +46,7 @@
     "@types/node": "~18.11.19",
     "@typescript-eslint/parser": "^7.9.0",
     "@typescript-eslint/utils": "^7.9.0",
+    "@vitest/coverage-v8": "^1.6.0",
     "c8": "^9.1.0",
     "cspell": "^8.8.1",
     "eslint": "^8.57.0",