add String Utilities Flow Action for common text transformations

[juhikumarimodi6]

Description

This Flow Action performs common string transformations in ServiceNow Flows. It supports multiple operations such as:

• uppercase — converts string to uppercase
• lowercase — converts string to lowercase
• titlecase — capitalizes the first letter of each word
• sentencecase — capitalizes the first letter of the string
• trim — removes leading and trailing spaces

Inputs:

• inputString — the string to transform
• operation — the operation to perform

Outputs:

• result — transformed string
• success — true if executed successfully
• message — status or error message

[github-actions]

✅ Valid PR for ActionPack

Thank you for your contribution. This PR complies with the CONTRIBUTING.md.
A maintainer will review this shortly. In the meantime, Happy Hacking!

[niamccash]

Thank you for your contribution!