Add Playwright e2e smoke test and accessibility checklist

package-lock.json

@@ -8,10 +8,12 @@
       "name": "image-filters",
       "version": "0.1.0",
       "devDependencies": {
+        "@playwright/test": "^1.62.1",
         "@testing-library/jest-dom": "^7.0.0",
         "@testing-library/react": "^16.3.2",
         "@wordpress/components": "^29.12.0",
         "@wordpress/scripts": "^27.0.0",
+        "axe-core": "^4.13.0",
         "jsdom": "^29.1.1"
       }
     },
@@ -3607,7 +3609,6 @@
       "integrity": "sha512-DTcUc8qii+cpHvtOwggMtBRMjKZHXYWdw8syRYu2vtzuq4Wxphqq4NfCs5Zt44L6mA8rfDfj+PHnxFc/FeK6mQ==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "dependencies": {
         "playwright": "1.62.1"
       },
@@ -17636,7 +17637,6 @@
       "integrity": "sha512-0M+L3LAD8/nm554LOla9Ayx0j0tmFZ0FBcoQ7F1VuVHpM/XpiC8RcDzBQB8W5+hA8L22THxELzeF+2WcUzvcLg==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "dependencies": {
         "playwright-core": "1.62.1"
       },
@@ -17656,7 +17656,6 @@
       "integrity": "sha512-wPYSwEBJY9GHraISXqyqtx0na0LpO3XEX7jNDhntbex7tzUS7kLnZsOlFruFJB4Hi/rhDMjXGqHewDZ68nYZVw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "playwright-core": "cli.js"
       },
@@ -17675,7 +17674,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
       }