feat(test): implement Playwright E2E and Dockerized testing infrastructure

package-lock.json

@@ -1,13 +1,29 @@
 {
-  "name": "silverbullet-icalendar",
+  "name": "work",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "dependencies": {
+        "@playwright/test": "^1.58.2",
         "playwright": "^1.58.2"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.58.2",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.58.2.tgz",
+      "integrity": "sha512-akea+6bHYBBfA9uQqSYmlJXn61cTa+jbO87xVLCWbTqbWadRVmhxlXATaOjOgcBaWU4ePo0wB41KMFv3o35IXA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.58.2"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/fsevents": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",