Add demo script

demo.ss

@@ -0,0 +1,37 @@
+#!/usr/bin/env gxi
+
+(export main)
+
+(import :std/format
+	:std/iter
+	:gerbil/gambit/threads
+	:dlozeve/fancy/format
+	:dlozeve/fancy/table
+	:dlozeve/fancy/rule
+	:dlozeve/fancy/spinner)
+
+(def (main)
+  (display (rule "[bold green]Fancy demo" style: 'simple))
+  (displayln)
+  (displayln (parse-markup
+	      "[bold red]Lorem ipsum[/bold red] dolor sit amet, [underline]consectetur[/underline] adipiscing elit, sed do
+eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad
+minim veniam, [cyan]quis nostrud exercitation [bold]ullamco[/bold] laboris[/cyan] nisi ut
+aliquip ex ea commodo consequat. Duis aute irure dolor in
+reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
+pariatur. [yellow]Excepteur sint [underline]occaecat[/yellow underline] cupidatat non proident, sunt in
+culpa qui officia deserunt mollit anim id est laborum."))
+  (displayln)
+
+  (def tab (table '("[bold]#" "[bold]Name" "[bold]Property") '(3 20 20)))
+  (display (table-header tab))
+  (display (table-row tab "42" "[green]Foo" "Bar"))
+  (display (table-row tab "21" "[red]Toto" "Blublu"))
+  (display (table-footer tab))
+  (displayln)
+  (displayln)
+  (for ((i (in-range 20)))
+    (display (spinner i "[yellow]Waiting:" (format "(computing ~d/20)" (1+ i))
+		      style: 'dots))
+    (thread-sleep! 0.1))
+  (displayln))