R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'muttest'

muttest::ci-integration |  | Running muttest in CI | HTML | source | R code
muttest::getting-started |  | Getting Started with muttest | HTML | source | R code
muttest::interpreting-results |  | Reading mutation results and strengthening tests | HTML | source | R code
muttest::mutation-testing-101 |  | What is Mutation Testing and Why Does it Matter? | HTML | source | R code
muttest::mutators |  | Mutator Reference and Choosing the Right Mutators | HTML | source | R code