Merge branch 'sprint-4' into 'main'

sprints/04.md

src/package.json

src/public/css/eventAddMenu.css

src/public/css/styles.css

src/public/images/en_flag.png

src/public/images/fr_flag.png

src/public/js/agenda.js

src/public/js/calendar.js

src/public/js/internationalization.js

src/public/js/search.js

src/views/index.ejs

src/views/partials/createAgendaModal.ejs

src/views/partials/createRecurringEvent.ejs

src/views/partials/editRecurringEventModal.ejs

src/views/partials/eventAddMenu.ejs