Ajout du linter et améliorations en conséquences

README.md

assets/css/fonts.css

components/AccountPlaceholder.vue

components/AppFooter.vue

components/AppHeader.vue

components/ColorModeButton.vue

eslint.config.mjs

layouts/clear.vue

layouts/default.vue

middleware/auth.ts

nuxt.config.ts

package-lock.json

package.json

pages/exercices.vue

pages/exercices/[id].vue

pages/login.vue

utils/mapper/UserMapper.ts