readme: list supported printers

README.md

@@ -29,3 +29,31 @@ ptouch-api [--config config.toml]
   [ptouch-rs documentation](https://docs.rs/ptouch-rs/latest/ptouch_rs/struct.Status.html)
   for details about the fields.
 - PUT `/print`: print the uploaded image, supports png, jpg and bmp
+
+## Supported printers
+
+The following printers are currently supported
+
+ - PT-9200DX
+ - PT-2300
+ - PT-2420PC
+ - PT-2450PC
+ - PT-1950
+ - PT-2700
+ - PT-1230PC
+ - PT-2430PC
+ - PT-1230PC_PLite
+ - PT-2430PC_PLite
+ - PT-2730
+ - PT-H500
+ - PT-E500
+ - PT-P700
+ - PT-P750W
+ - PT-P700_PLite
+ - PT-P750W_PLite
+ - PT-D410
+ - PT-D450
+ - PT-D460BT
+ - PT-D600
+ - PT-D610BT
+ - PT-P710BT