Test/add e2e and unit testing (#1282)

* feat: add string utility tests and vitest browser configuration

* feat: add Playwright for end-to-end testing and update snapshots

- Introduced Playwright for E2E testing with a new configuration file.
- Added test scripts to package.json for running E2E tests.
- Updated package-lock.json and package.json with new dependencies for Playwright and types.
- Created new SVG snapshot files for various layers (ruler, scaleBar, temperature, terrain, vignette, zones) to support visual testing.
- Excluded e2e directory from TypeScript compilation.

* Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Add SVG layer snapshots for various components

- Added ruler layer snapshot with hidden display.
- Added scale bar layer snapshot with detailed structure and styling.
- Added temperature layer snapshot with opacity and stroke settings.
- Added terrain layer snapshot with ocean and land heights groups.
- Added vignette layer snapshot with mask and opacity settings.
- Added zones layer snapshot with specified opacity and stroke settings.

* fix: update Playwright browser installation command to use npx

* Update snapshots

* refactor: remove unused layer tests and their corresponding snapshots as fonts are unpredictable

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: SheepFromHeaven

.github/workflows/playwright.yml

@@ -0,0 +1,25 @@
+name: Playwright Tests
+on:
+  pull_request:
+    branches: [ master ]
+jobs:
+  test:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - uses: actions/setup-node@v5
+      with:
+        node-version: '24'
+    - name: Install dependencies
+      run: npm ci
+    - name: Install Playwright Browsers
+      run: npx playwright install --with-deps
+    - name: Run Playwright tests
+      run: npm run test:e2e
+    - uses: actions/upload-artifact@v4
+      if: ${{ !cancelled() }}
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30

.gitignore

@@ -1,5 +1,8 @@
 .vscode
 .idea
 /node_modules
+*/node_modules
 /dist
 /coverage
+/playwright-report
+/test-results