Add Ukrainian tutorial

* etc/tutorials/TUTORIAL.uk: Create the translation.
* lisp/language/cyrillic.el: Link "Emacs Tutorial"
to the translation if the system is Ukrainian, and
add our modern greeting as a sample text.
* etc/NEWS:
* etc/tutorials/TUTORIAL.translators: Attribute my work (bug#55250).

etc/NEWS

@@ -1323,6 +1323,9 @@ supported.
 Type 'C-u C-h t' to select it in case your language setup does not do
 so automatically.
 
+---
+*** New Ukrainian translation of the Emacs Tutorial.
+
 ---
 *** New default phonetic input method for the Tamil language environment.
 The default input method for the Tamil language environment is now

etc/tutorials/TUTORIAL.translators

@@ -90,6 +90,10 @@ Maintainer: Mats Lidell <matsl@contactor.se>
 Author:     Virach Sornlertlamvanich <virach@nectec.or.th>
 Maintainer: Virach Sornlertlamvanich <virach@nectec.or.th>
 
+* TUTORIAL.uk:
+Author:     Denys Nykula <vegan@libre.net.ua>
+Maintainer: Denys Nykula <vegan@libre.net.ua>
+
 * TUTORIAL.zh:
 Author:     Chao-Hong Liu <chliu@gnu.org>
 Maintainer: Chao-Hong Liu <chliu@gnu.org>

lisp/language/cyrillic.el

@@ -131,11 +131,13 @@ Support for Russian using koi8-r and the russian-computer input method.")
   :mime-charset 'koi8-u)
 
 (set-language-info-alist
- "Ukrainian" '((charset koi8-u)
+ "Ukrainian" '((tutorial . "TUTORIAL.uk")
+	       (charset koi8-u)
 	       (coding-system koi8-u)
 	       (coding-priority koi8-u)
 	       (nonascii-translation . koi8-u)
 	       (input-method . "ukrainian-computer")
+	       (sample-text . "Ukrainian (Українська)	Слава Україні!")
 	       (documentation
 		. "Support for Ukrainian with KOI8-U character set."))
  '("Cyrillic"))