Add support for the Balinese script (bug#55648)

Add support for the Balinese script (bug#55648)

* lisp/language/indonesian.el ("Balinese"): New language environment.
Add composition rules for Balinese.  Add sample text and input
method.
* lisp/international/fontset.el (script-representative-chars)
(setup-default-fontset): Support Balinese.
* lisp/leim/quail/indonesian.el ("balinese"): New input method.
* lisp/loadup.el: Preload lisp/language/indonesian.el.

* etc/HELLO: Add a Balinese greeting.
* etc/NEWS: Announce the new language environment and its
input method.