catimg: add page (#8412)

* catimg: add page

* Switch "path/to/input" with "path/to/file"

* Remove "and" from see also section

* Replace "custom" with a provided value

* Improve resolution description

* Remove trailing whitespace

* Improve width/height description

pages/common/catimg.md

@@ -0,0 +1,21 @@
+# catimg
+
+> Image printing in the terminal.
+> See also: `pixterm`, `chafa`.
+> More information: <https://github.com/posva/catimg>.
+
+- Print a JPEG, PNG, or GIF to the terminal:
+
+`catimg {{path/to/file}}`
+
+- Double the [r]esolution of an image:
+
+`catimg -r 2 {{path/to/file}}`
+
+- Disable 24-bit color for better [t]erminal support:
+
+`catimg -t {{path/to/file}}`
+
+- Specify a custom [w]idth or [H]eight:
+
+`catimg {{-w|-H}} {{40}} {{path/to/file}}`