add user reporting modal

src/App.js

src/App.vue

src/components/checkbox/checkbox.js

src/components/checkbox/checkbox.scss

src/components/user_card/user_card.js

src/components/user_card/user_card.vue

src/components/user_reporting_modal/user_reporting_modal.js

src/components/user_reporting_modal/user_reporting_modal.vue

src/i18n/en.json

src/main.js

src/modules/reports.js