feat(trash): add synchronized trash support for windows (#2335)

* feat(trash): support 'trash' on Windows

* feat(trash): need sync wait on Windows to avoid switch to other app from nvim process

* doc: remove 'Only available for UNIX'

* doc(trash): highlight 'Trash' on Windows is syncrhonized

* doc(trash): highlight 'trash' on Windows is synchronized

* doc(trash): remove dot

* fix(trash): check for unix and windows

* fix(trash): comment

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

doc/nvim-tree-lua.txt

@@ -1148,7 +1148,6 @@ Configuration options for trashing.
     *nvim-tree.trash.cmd*
     The command used to trash items (must be installed on your system).
     The default is shipped with glib2 which is a common linux package.
-    Only available for UNIX.
       Type: `string`, Default: `"gio trash"`
 
 *nvim-tree.actions*
@@ -2293,7 +2292,7 @@ macOS
   system.
 
 Windows WSL and PowerShell
-- Trash is unavailable
+- Trash is synchronized
 - Executable file detection is disabled as this is non-performant and can
   freeze nvim
 - Some filesystem watcher error related to permissions will not be reported