chore: replace BrowserStack with Cypress cross-browser matrix

Author: yogeshchoudhary147

.github/workflows/browserstack.yml

@@ -0,0 +1,65 @@
+name: Cross-Browser Tests
+
+on:
+  merge_group:
+  workflow_dispatch:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+env:
+  NODE_VERSION: 22
+
+jobs:
+
+  cross-browser:
+
+    name: ${{ matrix.browser }}
+    runs-on: windows-latest
+    timeout-minutes: 25
+
+    strategy:
+      fail-fast: false
+      matrix:
+        browser: [chrome, firefox, edge]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event.pull_request.head.sha || github.ref }}
+
+      - name: Build package
+        uses: ./.github/actions/build
+        with:
+          node: ${{ env.NODE_VERSION }}
+
+      - name: Run cross-browser tests
+        uses: cypress-io/github-action@v6
+        with:
+          browser: ${{ matrix.browser }}
+          start: npm start
+          wait-on: 'http://127.0.0.1:3000'
+          spec: cypress/e2e/smoke-bs.cy.ts
+          config-file: cypress-bs.config.js
+          install-command: npx cypress install
+
+      - name: Upload Cypress screenshots
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: cypress-screenshots-${{ matrix.browser }}-${{ github.run_id }}
+          path: cypress/screenshots
+          retention-days: 30
+          if-no-files-found: ignore