pam*: add Korean translation (#14633)

* pam*: add Korean translation

* Update pages.ko/common/pambrighten.md

Co-authored-by: Chooooo <contact@choo.ooo>

* Update pages.ko/common/pamdice.md

Co-authored-by: Chooooo <contact@choo.ooo>

* Update pages.ko/common/pampop9.md

Co-authored-by: Chooooo <contact@choo.ooo>

---------

Co-authored-by: Chooooo <contact@choo.ooo>

pages.ko/common/pamstretch-gen.md

@@ -0,0 +1,9 @@
+# pamstretch-gen
+
+> PAM 이미지를 소수 값으로 확대.
+> 같이 보기: `pamstretch`, `pamenlarge`, `pamscale`.
+> 더 많은 정보: <https://netpbm.sourceforge.net/doc/pamstretch-gen.html>.
+
+- 지정된 소수 배율로 PAM 이미지 확대:
+
+`pamstretch-gen {{N}} {{경로/대상/이미지.pam}} > {{경로/대상/출력.pam}}`