Make the caster quick reference searchable

[DanKaplanSES]

Is your feature request related to a problem? Please describe.
I am often looking for information inside the caster quick reference, but I don't think it is searchable because it is a PDF.

Describe the solution you'd like
Make the information in the caster quick reference searchable.

I'll propose an implementation: convert the PDF into markdown, then it'll be searchable just like the rest of the documentation.

Describe alternatives you've considered
I don't know if this would work, but maybe I could clone the repository and use standard search tools locally.