add CODEOWNERS (#10175)

* add CODEOWNERS
---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

.github/CODEOWNERS

@@ -0,0 +1,21 @@
+/pages.de/ @pixelcmtd @marchersimon
+/pages.es/ @navarroaxel
+/pages.it/ @mebeim @yutyo
+/pages.pl/ @acuteenvy
+/pages.pt_BR/ @waldyrious
+/pages.pt_PT/ @waldyrious
+/pages.ta/ @kbdharun
+/pages.tr/ @yutyo
+/pages.zh/ @blueskyson @einverne
+/pages.zh_TW/ @blueskyson
+
+/contributing-guides/*.de.md @pixelcmtd @marchersimon
+/contributing-guides/*.es.md @navarroaxel
+/contributing-guides/*.it.md @mebeim @yutyo
+/contributing-guides/*.pl.md @acuteenvy
+/contributing-guides/*.pt_BR.md @waldyrious
+/contributing-guides/*.pt_PT.md @waldyrious
+/contributing-guides/*.ta.md @kbdharun
+/contributing-guides/*.tr.md @yutyo
+/contributing-guides/*.zh.md @blueskyson @einverne
+/contributing-guides/*.zh_TW.md @blueskyson