feat: improve ability to view files from the files admin section

[techfg]

Currently, when viewing Files in Studio, images offer a preview of the file, however it does not appear that other file types (e.g., json, txt, etc.) show previews. This results in the file not being viewable - the only way it seems possible is to put a "Link" on a view, use $File{...} merge syntax and then click the link to get to the file itself.

Studio should:

1. DIsplay a preview of the file unless the file type will not support it (e.g., binary)
2. Offer a "Preview/Get Link" button/link or similar to enable opening a new tab to view the file directly

Edit I just realized that you can click the "down arrow" to the right of the file name and it will download the file for viewing. While this works, it's not very intuitive and/or obvious. Per item 2 above, making this more prominent by adding a preview button/link in addition to the download arrow would be preferred.