Add free-text question with word and char limit validation

[mlt47]

Associated with api pull request

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Pull Request Check List

• Unit Tests & Regression Tests Added (Optional)
• [x] Removed Unnecessary Logs/System.Outs/Comments/TODOs
• [x] Added enough Logging to monitor expected behaviour change
• [x] Security - XSS/Injection - All user input validated or encoded before being used in page or URL
• [x] Security - Data Exposure - PII is not sent in URL or query params
• [x] Security - Access Control - Suitable authorisation added to new pages
• [x] Updated Release Procedure & Documentation
• [ ] Peer-Reviewed