Add more details about TerminalMenus API changes to NEWS (#36210)

NEWS.md

@@ -67,6 +67,21 @@ Standard library changes
  improved support for dynamic menus. These changes are compatible with the previous
  (deprecated) interface, so are non-breaking.
 
+ The new API offers several enhancements:
+
+ + Menus are configured in their constructors via keyword arguments
+ + For custom menu types, the new `Config` and `MultiSelectConfig` replace the global `CONFIG` Dict
+ + `request(menu; cursor=1)` allows you to control the initial cursor position in the menu (defaults to first item)
+ + `MultiSelectMenu` allows you to pass a list of initially-selected items with the `selected` keyword argument
+ + `writeLine` was deprecated to `writeline`, and `writeline` methods are not expected to print the cursor indicator.
+ The old `writeLine` continues to work, and any of its method extensions should print the cursor indicator as before.
+ + `printMenu` has been deprecated to `printmenu`, and it both accepts a state input and returns a state output
+ that controls the number of terminal lines erased when the menu is next refreshed. This plus related changes
+ makes `printmenu` work properly when the number of menu items might change depending on user choices.
+ + `numoptions`, returning the number of items in the menu, has been added as an alternative to implementing `options`
+ + `suppress_output` (primarily a testing option) has been added as a keyword argument to `request`,
+ rather than a configuration option
+
 #### SparseArrays
 
 * Display large sparse matrices with a Unicode "spy" plot of their nonzero patterns, and display small sparse matrices by an `Matrix`-like 2d layout of their contents.