Custom FormBuilder to support Netlify forms

[loicteixeira]

Netlify supports forms and FormBuilder could be made compatible:

• Create a template tag to output the form tag with all the necessary attributes
• Provide the necessary attributes directly if developers want to customise their forms
• Add option to set form's ID.
• Add option to add Netlify's recaptcha with default settings
• Add option to add Netlify's recaptcha with own settings
• Add option to add Netlify's honeypot field
• Update FormBuilder submissions interface to either display a message that submissions can be found on Netlify's dashboard or use the /forms/{form_id}/submissions endpoint of their API