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>