add cta section and footer

src/assets/img/partenaires-akoya.png

src/assets/img/partenaires-cget.png

src/assets/img/partenaires-rectorat.png

src/assets/img/partenaires-ridf.png

src/assets/img/partenaires-safran.png

src/assets/img/partenaires-upsaclay.png

src/assets/scss/mixins.scss

src/assets/scss/variables.scss

src/components/Button.vue

src/components/CallsToAction.vue

src/components/Footer.vue

src/components/Home.vue

src/components/LandingPage.vue

src/components/News.vue

src/components/NewsCard.vue