add client script: word counter in a field

[Rajat32-op]

PR Description:

This PR adds a new client script that provides real-time word counting functionality for ServiceNow form fields. The script displays word count in "X out of Y words" format with visual indicators to help users stay within specified word limits.

Pull Request Checklist

Overview

• I have read and understood the CONTRIBUTING.md guidelines
• My pull request has a descriptive title that accurately reflects the changes
• I've included only files relevant to the changes described in the PR title and description
• I've created a new branch in my forked repository for this contribution

Code Quality

• My code is relevant to ServiceNow developers
• My code snippets expand meaningfully on official ServiceNow documentation (if applicable)
• I've disclosed use of ES2021 features (if applicable)
• I've tested my code snippets in a ServiceNow environment (where possible)

Repository Structure Compliance

• I've placed my code snippet(s) in one of the required top-level categories:
  • Core ServiceNow APIs/
  • Server-Side Components/
  • Client-Side Components/
  • Modern Development/
  • Integration/
  • Specialized Areas/
• I've used appropriate sub-categories within the top-level categories
• Each code snippet has its own folder with a descriptive name

Documentation

• I've included a README.md file for each code snippet
• The README.md includes:
  • Description of the code snippet functionality
  • Usage instructions or examples
  • Any prerequisites or dependencies
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Restrictions

• My PR does not include XML exports of ServiceNow records
• My PR does not contain sensitive information (passwords, API keys, tokens)
• My PR does not include changes that fall outside the described scope

[ravichandra1998g]

Hello @Rajat32-op

Have you tested this works real time in ServiceNow?

[Rajat32-op]

Tested and realised that I need to use different function

[ravichandra1998g]

Hello @Rajat32-op
Thank you for changing the messages function.

still wanted to check if you have tested this real time when the limit is approaching?

[Rajat32-op]

Clear function was wrong. Now all three cases are working. I tested all of them

[ravichandra1998g]

let me check this..

[ravichandra1998g]

I have tested the script and this doesn't work in real time (continuously while typing). the script cannot handle the real time word counting and show when the limit is approaching.
closing this PR for now.