Create a framework for the project

[wznmickey]

No description provided.

[wznmickey]

All slides should be in ./slides/topic and the file to be compiled should be named as main.md.
Each of the slides will be under a /topic path to be visited. We may also need a root path html file as a directory.
See https://wznmickey.github.io/MissingSemester-slides/shell as an example

[wznmickey]

Any updates?