Add stl as shell prompt plugin

tree/.config/starship.toml

@@ -12,3 +12,10 @@ format = "[$user]($style)@"
 ssh_only = false
 format = "[$hostname]($style) in "
 
+[custom.stl]
+description = "time logger"
+when = "stl stat -f /home/hulthe/.stld" # touch the file, but don't create it
+command = "cat /home/hulthe/.stld"
+symbol = "🕑"
+style = "italic bright-purple"
+format = "[$symbol ($output )]($style)"