Feature - Mollie payment integration

[riteelama]

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, in Everest Forms there was no option for Mollie payment gateway integration. This PR allows the to integrate the normal Mollie payment and the recurring payment subscription using the Mollie payment.

Closes # .

How to test the changes in this Pull Request:

1. Checkout to this branch
2. Go to the EverestForms Dashboard>Features>Mollie
3. Enable the Mollie and click on the settings button after activating the feature.
4. The settings will navigate to the global settings>Payment Section.
5. Now enter the Test API key if you are using the Test Mode.
6. In order to use the Test Mode hit the Enable Test Mode toggle button.
7. You can retrieve the Test API key and create the account.
8. Go to Everest Forms>Add new.
9. Drag and drop the payment fields.
10. Go to Form settings>Payments>Mollie.
11. Enable the Mollie for simple payment.
12. Now preview the check whether it is working properly or not.

Enabling the Recurring payment

1. All steps upto enabling Mollie payment is same.
2. Now under the Subscription you can find the Enable recurring subscription payments on Mollie
3. Enable the toggle to use recurring payment.
4. Enter the Subscription Description, Recurring Duration, Time period of the recurring payment respectively.
5. Now Map the Customer's Email, Customer's First Name, Customer's Last Name. Note: These three fields are the required fields.
6. Now Perform the entry and check whether the customer and subscription is created or not from the Mollie Dashboard.

Everest Forms Pro PR Dependency
Note Regarding the backward compatibility if other payment gateways are enabled then Mollie won't be working by default.
Note You need to activate the Cards From SiteName>Organization Settings>Products>Payments. I have attached image for reference.
First Step
Second Step
Third Step

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 - Mollie payment integration

[deepench]

LGTM 👍

[joshianup1]

LGTM 👍

[NirajChaudhary143]

LGTM 👍

[joshianup1]

LGTM 👍