Render correct Rich viewer for binary files
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=230913) </details> <!--IssueSummary end--> Before supporting the binary files, the only deviation from the standard text snippets were markdown files. And those were presented with the rich viewer that has been using [the markdown field viewer](app/assets/javascripts/vue_shared/components/markdown/field_view.vue). After starting the support for different sorts of binary blobs, we should be more flexible and provide support for at least basic types like images, pdf files, etc.
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