showfigfonts: add page (#6217)

pages/common/figlet.md

@@ -1,6 +1,7 @@
 # figlet
 
 > Generate ASCII banners from user input.
+> Véase también `showfigfonts`.
 > More information: <http://www.figlet.org/figlet-man.html>.
 
 - Generate by directly inputting text:
@@ -9,12 +10,12 @@
 
 - Use a custom font file:
 
+`figlet {{input_text}} -f {{path/to/font_file.flf}}`
+
+- Use a font from the default font directory (the extention can be omitted):
+
 `figlet {{input_text}} -f {{font_filename}}`
 
 - Pipe command output through figlet:
 
 `{{command}} | figlet`
-
-- Show available figlet fonts:
-
-`showfigfonts {{optional_string_to_display}}`