Ability to add metadata via dropdown

Problem Statement
Metadata is used across many of Pelcro's customers to create different workflows such as opt-ins for privacy policy & terms & conditions, determining access levels for end-users, across integrations & JS customizations. Since metadata fields & values are case sensitive, the current way of adding metadata makes a lot of room for human error. We need to offer a smarter way for admins to create customers from the platform and their metadata


Adding a metadata field should be selectable from a dropdown menu containing all metadata fields existing on the site/account in question
We should also have the option to create a new custom metadata field name
Indicating the value of a field should be selectable from a dropdown menu containing all metadata values for this exact field existing on the site/account in question