Collates a Slide with a Header and Content

Usage

.collate_slide(
  header,
  content,
  string = "{{content}",
  fit = TRUE,
  code = FALSE
)

header: A length-one character vector. These usually start with `\n\n##`
content: A length-one character vector with the function_details for the slide
string: A length-one character vector formatted to be used in `glue::glue(string, .open = "{{")` where the object being replaced is `content`. This is done to avoid needing to reach outside the function environment to access `content`.
fit: A logical if `r-fit-text` should be applied to the content supplied

A length-two character vector