feat(post) : add design "appel à projet"

src/app/post/components/post-list/post-list.component.html

src/app/post/components/post-list/post-list.component.scss

src/app/post/components/post-list/post-list.component.ts

src/app/post/post.component.html

src/app/shared/components/svg-icon/svg-icon.component.scss

src/assets/post/sprite.svg

src/assets/scss/_typography.scss