Add constant for README.md

Author: mbtools

src/zif_types.intf.abap

@@ -213,6 +213,9 @@ INTERFACE zif_types PUBLIC.
       extension TYPE c LENGTH 4 VALUE 'json',
     END OF c_package_json_file.
 
+  "! Package Readme File
+  CONSTANTS c_readme_file TYPE string VALUE 'README.md'.
+
   CONSTANTS:
     "! Package Types
     BEGIN OF c_package_type,