Support file icons similar to treeview item icon path in terminal icon path

[karthiknadig]

In TreeViewItem, we can provide a resourceUri and ThemeIcon.File for iconPath to get file icons for the TreeViewItem. This should also work for Terminal Icon.

See discussions in issues:
#232439
For QuickPick: #59826

[Tyriar]

@karthiknadig do you have example extension code that could illustrate the ask?

[karthiknadig]

For activated terminals, we want to show the icons for the file/python manager used to activate this terminal:

For terminals, currently the only options is this. No way to get file icons. Can't really use the file path to get fileicons.

For tree views I can do this:

TreeView consumption example:

I want to be able to use the same icon in terminal.