Create README.md

Author: chetnadev

Client-Side Components/Client Scripts/Client Validation of Attachments by File Type and Count/README.md

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+This ServiceNow client script is designed to validate file attachments on a form before submission. It's most likely used as a "Client Script" or "Client Script in a Catalog Item" that runs in the browser when a user tries to submit a form.
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+This client script runs when a form is submitted in ServiceNow. It checks if the user has:
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+Attached at least one file (shows an error if none).
+Attached no more than three files (shows an error if more).
+Only uploaded files of type PDF or PNG (shows an error for other types).
+If any of these checks fail, the form submission is blocked and an appropriate error message is displayed.