Update yarn and scripts

.yarnrc.yml

@@ -1,11 +1,11 @@
+compressionLevel: mixed
+
+enableGlobalCache: false
+
 nodeLinker: node-modules
 
 npmScopes:
   siteimprove:
     npmRegistryServer: "https://npm.pkg.github.com"
 
-plugins:
-  - path: .yarn/plugins/@yarnpkg/plugin-workspace-tools.cjs
-    spec: "@yarnpkg/plugin-workspace-tools"
-
-yarnPath: .yarn/releases/yarn-3.3.0.cjs
+yarnPath: .yarn/releases/yarn-4.5.0.cjs

accessibility-code-checker/playwright/.gitignore

@@ -0,0 +1 @@
+test-results/.last-run.json

package.json

@@ -7,10 +7,10 @@
     "watch": "tsc --build --watch",
     "clean": "tsc --build --clean",
     "knip": "knip -c config/knip.ts",
-    "test": "yarn workspaces foreach -v -p --exclude 'end-to-end-testing-{puppeteer,webdriver}' --exclude 'custom-testing-{crawling,measuring-performance}' --exclude 'unit-testing-angular' --exclude 'code-checker-*' run test",
+    "test": "yarn workspaces foreach -A -v -p --exclude 'end-to-end-testing-{puppeteer,webdriver}' --exclude 'custom-testing-{crawling,measuring-performance}' --exclude 'unit-testing-angular' --exclude 'code-checker-*' run test",
     "code-checker:comment": "echo 'First start the server with `yarn code-checker:start`, next run the tests with `yarn code-checker:test`. The tests are failing since the pages are purposefully not accessible; do not run them in blocking CI flows.'",
     "code-checker:start": "yarn workspace code-checker-demo-site run dev",
-    "code-checker:test": "yarn workspaces foreach -v -p --include 'code-checker-*' --exclude 'code-checker-demo-site' run test"
+    "code-checker:test": "yarn workspaces foreach -A -v -p --include 'code-checker-*' --exclude 'code-checker-demo-site' run test"
   },
   "workspaces": [
     "common",
@@ -34,5 +34,5 @@
   "resolutions": {
     "enzyme/cheerio": "=1.0.0-rc.3"
   },
-  "packageManager": "yarn@3.3.0"
+  "packageManager": "yarn@4.5.0"
 }