Is your feature request related to a problem? Please describe.

• It's possible to use <sl-input type="file"> to use the native browser file picker https://shoelace.style/components/input#input-types
• A file input component with nicer UI/UX would be nice, where the user clicks an area and the file picker pops up.

Describe the solution you'd like

• A component to upload files, with hooks for the file upload etc.
• Allow drag-and-drop, plus clicking.
• Need to handle multiple files?
• Perhaps even optionally display the file icon in the upload area once done.