The retail spec does not have the standard enums defined for various string types

[rajaneeshk90]

Issue Details:

Problem Statement:
The current retail specification lacks a well-defined structure for handling enumerations (enums), leading to potential confusion for developers. Enumerations are essential for maintaining a consistent set of values, and a standardized approach is needed for better spec organization.

Proposed Solution:
Establish a clear and standardized structure for handling enums within the retail spec. Create a dedicated "Enums" directory within api subdirectory for enums that are utilized. This subdirectory should contain the relevant enum files, appropriately named and documented.

Benefits:

1. Enhanced Spec Organization: A well-structured "Enums" directory will improve the organization of enum definitions, making it easier for developers to locate and maintain them.
2. Ease of Reference: The organized enum structure allows for quick and efficient reference, benefiting developers who need to work with or extend existing enumerations.