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.

package.json

@@ -18,11 +18,14 @@
     "build": "tsc && vite build",
     "preview": "vite preview",
     "test": "vitest",
-    "test:browser": "vitest --config=vitest.browser.config.ts"
+    "test:browser": "vitest --config=vitest.browser.config.ts",
+    "test:e2e": "playwright test"
   },
   "devDependencies": {
+    "@playwright/test": "^1.57.0",
     "@types/d3": "^7.4.3",
     "@types/delaunator": "^5.0.3",
+    "@types/node": "^25.0.10",
     "@types/polylabel": "^1.1.3",
     "@vitest/browser": "^4.0.18",
     "@vitest/browser-playwright": "^4.0.18",