more: split util-linux and POSIX implementations (#12171)

* more: add page

---------

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

pages/linux/more.md

@@ -0,0 +1,29 @@
+# more
+
+> Interactively display a file, allowing scrolling and searching.
+> See also: `less`.
+> More information: <https://manned.org/more>.
+
+- Open a file:
+
+`more {{path/to/file}}`
+
+- Display a specific line:
+
+`more +{{line_number}} {{path/to/file}}`
+
+- Go to the next page:
+
+`<Space>`
+
+- Search for a string (press `n` to go to the next match):
+
+`/{{something}}`
+
+- Exit:
+
+`q`
+
+- Display help about interactive commands:
+
+`h`