Add svg preview to filepicker

[martinknor]

Current state: Supported extensions include jpg, jpeg, png, gif, webp, avif.

grav-plugin-admin/themes/grav/js/admin.min.js

Line 4651 in eb3cc2e

if (imagesPreview && folder && (!item.status || item.status === 'available') && item.name.match(/\.(jpg|jpeg|png|gif|webp|avif)$/i)) {

grav-plugin-admin/themes/grav/app/forms/fields/filepicker.js

Line 83 in eb3cc2e

if (imagesPreview && folder && (!item.status || item.status === 'available') && item.name.match(/\.(jpg|jpeg|png|gif|webp|avif)$/i)) {

Request: Please add support for SVG previews as well.

Current:

Expected: