Feature - Regex validation for field

[dipuchaudhary]

All Submissions:

• Have you followed the Everest Forms Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Previously, We don't have the option to add custom regular expression validation for the field to validate it. Currently, this option is available for email, first name, last name, input field, number field and website field. The PR will introduce this feature.

How to test the changes in this Pull Request:

1. Go to form builder then advanced settings of field options.
2. enable regex validation and select a predefined regular expression or input a custom regular expression.
3. update the form and verify whether it is working fine or not.

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?
• Have you updated the documentation accordingly?

Changelog entry

Feature - Regex validation for field.

[deepench]

LGTM 👍

[MILAN88888]

LGTM 👍