Refactor to Vue 3 recommended ESLint rules

These updates ensure better adherence to Vue 3 standards and improve
overall code quality and readability.

- Update ESLint configuration from Vue 2.x to Vue 3 rules.
- Switch from "essential" to strictest "recommended" ESLint ruleset.
- Adjust ESLint script to treat warnings as errors by using
  `--max-warnings=0` flag. This enforces stricter code quality controls
  provided by Vue 3 rules.

package-lock.json

@@ -6,7 +6,7 @@
   "packages": {
     "": {
       "name": "privacy.sexy",
-      "version": "0.12.5",
+      "version": "0.12.7",
       "hasInstallScript": true,
       "dependencies": {
         "@floating-ui/vue": "^1.0.2",