Add ability to specify which github stats should be called

[cansavvy]

Right now these are the API calls run:

What we'll wanna do besides add more documentation about all of these is to allow users to specify which ones they want. This would allow people to remove stats from the list if for some reason they don't have persmissions or its not applicable.

I think an argument like called github_stats would be added to this argument as well as the others that call it.

metricminer/R/github.R

Line 161 in 1dc2e7a

get_github_metrics <- function(repo, token = NULL, count = 100000, data_format = "dataframe", time_course = FALSE) {

By default it would be all where all is recoded into the full respective list. But otherwise someone could specify which they want and then we'd subset api_calls to what is specified. This would require each of these to be well documented.

https://github.com/fhdsl/metricminer/blob/main/R/github.R#L175

 if (time_course) {
    api_calls <- list(
      clones = "GET /repos/{owner}/{repo}/traffic/clones",
      views = "GET /repos/{owner}/{repo}/traffic/views"
    )
  } else {
    api_calls <- list(
      repo_activity = "GET /repos/{owner}/{repo}/activity",
      stars = "GET /repos/{owner}/{repo}/stargazers",
      forks = "GET /repos/{owner}/{repo}/forks",
      contributors = "GET /repos/{owner}/{repo}/contributors",
      community = "GET /repos/{owner}/{repo}/community/profile"
    )
  }