Allow adding organisers during workshop creation

[biggianteye]

Description of the issue 📄

When you create a workshop, you cannot set who is going to be running that workshop. You have to first create it and then edit it to be able to manage organisers. It would be good to be able to set everything up in one go.

Screenshots 📷

The interface when you create a workshop. No "Organisers" field.

The interface when you edit a workshop. The "Organisers" field is visible.

Steps to fix 🛠

Make the Organisers visible as part of creating a workshop.

To do 📋

• [ ] Claim this issue (comment below, or assign yourself if you are part of the codebar org)
• [ ] Fork and clone the repository
• [ ] Update the relevant files. Follow the steps to fix section in this issue.
• [ ] Commit your changes as one commit. Use the title of this issue as your commit message
• [ ] Submit a pull request
• [ ] Mention this issue in the PR description by including it's number
• [ ] Have your pull request reviewed & merged by a codebar team member