Add image description support (#7518)

* recieve image descriptions under the name property

* fix other components

* use comment for alt and title

* allow editing of file comment

* allow editing of file comment in note dialog

* federate note comments

* use file instead of this

* backend should accept comment on update

* update now actually accepts comment

* allow multiline descriptions

* image should also have description attached

* Update locales/ja-JP.yml

Co-authored-by: rinsuki <428rinsuki+git@gmail.com>

* Use custom component with side-by-side image

* improve usability on mobile devices

* revert changes

* Update post-form-attaches.vue

* Update drive.file.vue

* Update media-caption.vue

Co-authored-by: rinsuki <428rinsuki+git@gmail.com>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

src/client/components/image-viewer.vue

@@ -2,7 +2,7 @@
 <MkModal ref="modal" @click="$refs.modal.close()" @closed="$emit('closed')">
 	<div class="xubzgfga">
 		<header>{{ image.name }}</header>
-		<img :src="image.url" :alt="image.name" :title="image.name" @click="$refs.modal.close()"/>
+		<img :src="image.url" :alt="image.comment" :title="image.comment" @click="$refs.modal.close()"/>
 		<footer>
 			<span>{{ image.type }}</span>
 			<span>{{ bytes(image.size) }}</span>