Including preview_image into gallery selection panel

[kolibril13]

It would be nice to use the social media preview image in gallery selection panel.
https://github.com/kolibril13/plywood-gallery-minimal-example/blob/e364cb73922018c9d3bbb09bf9fa9861befe3449/gallery_config.yaml#L5

Purposed design :

Current:

[Rickaym]

I like the proposal!

I think we should use this issue as part of the project from upgrading the TreeView into a WebView--which allows custom HTML rendering.

Currently, we're using the default implementation of VSCode's TreeDataProvider for our TreeViews: this does not allow custom HTML to be displayed. As part of a means to create a better user-friendly version for the TreeView, I've considered using a WebView rather than the data provider (pending implementation is at .../hub/hub.html containing the HTML code that should be rendered to display the TreeView)

Implementing a WebView means that we'll also have to factor in displaying the tree items (if the proposed implementation of the TreeView still wants to use it)

It would be awesome if you could contribute the HTML implementation for the TreeView--also do let me know if there's any confusion.

Ricky.