Add Decisioning Content data type for ExD Offer Content Personalization

[kmmraju]

https://jira.corp.adobe.com/browse/CJM-135243

Summary

• Introduces a new XDM data type decisioning-content under extensions/adobe/experience/decisioning/ to support expression-based content personalization in decisioning offers.
• The schema defines a content field with:
  • contentType — an enum (text, json, html) indicating how the expression should be interpreted
  • expression — a string containing the dynamic content expression
• Includes two example files validating text and HTML content types.

Motivation

As part of the ExD Offer Content Personalization initiative (Techspec), decisioning offers need a standardized way to define dynamic content fields with expression-based personalization. This data type enables offers to carry content expressions in multiple formats (plain text, HTML, JSON), allowing the decisioning engine to render personalized content at delivery time.

Files Changed

File	Description
decisioning-content.schema.json	New XDM data type schema with contentType enum and expression string
decisioning-content.example.1.json	Example: text content type
decisioning-content.example.2.json	Example: HTML content type

Test Plan

• npm test — all 2131 mocha tests pass (schema loads and validates against meta-schema)
• ajv validate — both examples validate against the schema
• Invalid content (missing required fields) correctly rejected by schema validation