feat: allow external drop and add dropzone - #40674

How does it handle rich workspaces?

@nimishavijay @jancborchardt please advise updated design in the first comment!

@nimishavijay @jancborchardt please advise updated design in the first comment!

Design tuning can/will be a followup though

Nice! This looks good already, nice touch with the folder opening icon :)

Follow up points:

• While dragging in the header, if your cursor is hovering over the header, there should be some hover feedback, similar to when your cursor is over a subfolder. So the background of the header section can change to --color-primary-light and the font color to --color-primary for example.
• Since this is shown only while dragging, the message could be even more attention grabbing, so we could make the font bold

(ref. Gdrive's drop indication which is really attention grabbing)

• While dragging in the header, if your cursor is hovering over the header, there should be some hover feedback, similar to when your cursor is over a subfolder. So the background of the header section can change to --color-primary-light and the font color to --color-primary for example.

Those two colours doesn't really go together? Is this a mistake? :)