Merge branch '12-community-join' into 'main'

src/declarations.ts

src/layout/OcLayoutBiColumn/OcLayoutBiColumn.vue

src/locales/en.ts

src/locales/fr.ts

src/pages/community/[community]/join.vue

src/sparql/communities.ts

src/sparql/sparql.ts

src/stores/community.ts

typed-router.d.ts