Allow to configure editor heading levels and set level 2 as start for posts

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/views/Posts/EditView.vue

@@ -43,6 +43,7 @@
             :aria-label="t('Post body')"
             :current-actor="currentActor"
             :placeholder="t('Write your post')"
+            :headingLevel="[2, 3, 4]"
           />
         </o-field>
         <h2 class="mt-2">{{ t("Who can view this post") }}</h2>

js/src/views/Posts/PostView.vue

@@ -111,7 +111,7 @@
               "
             >
               <router-link
-                class="flex gap-1 whitespace-nowrap"
+                class="flex gap-1 whitespace-nowrap flex-1"
                 :to="{
                   name: RouteName.POST_EDIT,
                   params: { slug: post.slug },