imgcat: move from osx to common, update page (#10203)

pages/common/imgcat.md

@@ -1,9 +1,9 @@
 # imgcat
 
-> A utility to display images directly on the command-line.
+> Display images on the command-line.
 > Requires a compatible terminal such as iTerm2.
 > More information: <https://github.com/danielgatis/imgcat>.
 
 - Display an image on the command-line:
 
-`imgcat {{filename}}`
+`imgcat {{path/to/file}}`