[APP] Forms.io

**Name of app / service**
Forms.io (commercial and opensource)

**Link to developer documentation**
https://github.com/formio/formio
https://apidocs.form.io/?version=latest

**Is lack of support preventing you from building workflows, or do you have a workaround?**
Not at this time. I just discovered this and I have chosen to invest my time in learning it and using it as a frontend for Pipedream.

**Are there specific actions, or triggers, you'd like to see for this app? Please let us know here or use the Action and Trigger issue templates to open requests for each!**
I know it sounds greedy, but I think this is a great candidate for a flagship integration. Pipedream and Form.io may turn out to be the next killer application platform.