Create facilitator guide document to tell people how to conduct the workshop, pick & choose modules, and operate Remark

This should tell people how to do a bunch of things they may not know how to!

Refer to the [People's Open facilitator guide](https://github.com/buildyourowninternet/buildyourowninternet.github.io/blob/master/workshop.md) for inspiration!

- How to find people to participate
- How to Pick & choose modules for the group
- How to edit modules
- How to operate Remark