ci: migrate workflows to use Yarn as package manager

Author: CodeWithEmad

.github/workflows/playwright.yml

@@ -14,13 +14,13 @@ jobs:
         with:
           node-version: lts/*
       - name: Install dependencies
-        run: npm ci
+        run: yarn install
       - name: Install Playwright Browsers
         run: npx playwright install --with-deps
       - name: Install serve
-        run: npm install -g serve
+        run: yarn global add serve
       - name: Build application
-        run: npm run build
+        run: yarn build
       - name: Start static file server
         run: serve out & npx wait-on http://localhost:3000
       - name: Run Playwright tests

.github/workflows/test.yml

@@ -6,22 +6,17 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
-
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
-
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
-
+          node-version: '22'
+          cache: 'yarn'
       - name: Install dependencies
-        run: npm ci
-
+        run: yarn install
       - name: Run linting
-        run: npm run lint
-
+        run: yarn lint
       - name: Build
-        run: npm run build
+        run: yarn build