[Meta] Support preview of more image/design/video/3d file image formats

• Sketch https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10301
• PSD https://gitlab.com/gitlab-org/gitlab-ce/issues/13189
• PDF PDF: https://gitlab.com/gitlab-org/gitlab-ce/issues/19360
• add more formats

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It would be great to have support for more image/design/video/3d formats, think of .sketch, .psd, .tiff, .webm, .webp, .targa, .obj, .fbx .dae .

What is the currently supported list?

This would benefit the overall, design and 3d community immensely and would make GitLab instantly the immediate competitor in design file versioning everywhere.