Add support for the Hanifi Rohingya script (bug#55745)

* lisp/language/misc-lang.el ("Hanifi Rohingya"):
New language environment.
Add composition rules for Hanifi Rohingya.
Add sample text and input method.
* lisp/international/fontset.el (script-representative-chars)
(setup-default-fontset): Support Hanifi Rohingya.
* lisp/leim/quail/misc-lang.el ("hanifi-rohingya"):
New input method.

* etc/HELLO: Add a Hanifi Rohingya greeting.
* etc/NEWS: Announce the new language environment.

lisp/language/misc-lang.el

@@ -212,6 +212,28 @@ thin (i.e. 1-dot width) space."
    (list (vector "[\U00013000-\U0001342E]+"
                  0 #'font-shape-gstring))))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Hanifi Rohingya
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(set-language-info-alist
+ "Hanifi Rohingya" '((charset unicode)
+                     (coding-system utf-8)
+                     (coding-priority utf-8)
+                     (input-method . "hanifi-rohingya")
+                     (sample-text . "Hanifi Rohingya (𐴌𐴟𐴇𐴥𐴝𐴚𐴒𐴙𐴝 𐴇𐴝𐴕𐴞𐴉𐴞 𐴓𐴠𐴑𐴤𐴝)	𐴀𐴝𐴏𐴓𐴝𐴀𐴡𐴤𐴛𐴝𐴓𐴝𐴙𐴑𐴟𐴔")
+                     (documentation . "\
+Rohingya language and its script Hanifi Rohingya are supported
+in this language environment.")))
+
+;; Hanifi Rohingya composition rules
+(set-char-table-range
+ composition-function-table
+ '(#x10D1D . #x10D27)
+ (list (vector
+        "[\x10D00-\x10D27]+"
+        1 'font-shape-gstring)))
+
 (provide 'misc-lang)
 
 ;;; misc-lang.el ends here