Merge branch 'footnote-markdown' into 'dev'

.gitlab-ci.yml

components/Nav/Navbar.vue

components/content/Alert/Danger.vue

components/content/Alert/ExpansionDetails.vue

components/content/Alert/Info.vue

components/content/Alert/Tip.vue

components/content/Alert/Warning.vue

components/content/ArticleDoi.vue

components/content/ArticleDoiList.vue

components/content/Contributors.vue

components/content/Ref.vue

composables/useFetchArticle.ts

content/3.defense-systems/abi2.md

content/3.defense-systems/abia.md

content/3.defense-systems/detocs.md

nuxt.config.ts

server/plugins/content.ts