Create README.md

Author: Soumyadeep10

Server-Side Components/Business Rules/Attachments check High-Risk or High-Impact Change request/README.md

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+This Before Update business rule acts as a safeguard in a Change management process, 
+ensuring that critical changes(those marked as high impact or high risk)
+are properly documented before progressing to key implementation stages.
+
+**What It Does**:
+-The BR triggers before a change request record is updated, specifically when the state changes to either Scheduled or Implement.
+
+-It checks whether the change is classified as high impact or high risk.
+
+-If the change meets either of those criteria, it verifies that at least two attachments are present on the record. 
+ These attachments are expected to be essential supporting documents like an Implementation Plan or Backout Procedure.
+
+-If the required documentation is missing, the rule blocks the state change and displays an error message to the user, 
+ preventing the change from moving forward until compliance is met.