fix: custom form implementation

[anhanh11001]

Details:

• Fetch custom form when ordering ticket. A custom field will contain information like this:

"attributes":{  
            "deleted-at":null,
            "field-identifier":"address",
            "type":"text",
            "is-required":false,
            "is-included":true,
            "form":"attendee",
            "is-fixed":false
         },

• Showing fields that is included in the custom forms
• Set required fields when form indicate required
• Apply data binding to Attendee View

Fixes: #1966

Screenshots
Example of applying all fields with firstname, lastname, email, github required

[anhanh11001]

Resolved conflicts

[iamareebjamal]

Database has changed to use 7.json now

[anhanh11001]

Updated