Create TriggerTransformMap README.md

Author: ChandBasha-code

Integration/Import Sets/Import sets overview/TriggerTransformMap README.md

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+Executes a Transform Map on the given Import Set.
+
+When working with Import Sets and Transform Maps in ServiceNow, it’s common to automate data transformation after a Data Source load completes.
+This script simplifies that by programmatically running the Transform Map using the GlideImportSetTransformerWorker API.
+
+Fetches the Transform Map sys_id from the property tmap.tag.sys.id
+Transforms data from the specified Import Set into the target table
+Runs the transformation asynchronously (in the background)
+Pass the importset SysId from flow inputs after trigger the datasource