Add twocat data to package documentation

Author: BrittanyTroast-NOAA

R/twocat_data_formatted.R

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+#' Count and revenue data per region
+#'
+#' A dataset containing simulated metric data for package examples. This example is for four population metrics corresponding to different areas.
+#'
+#' @format A multi-indicator data frame with data in two main categories:
+#' \describe{
+#'   \item{year}{A vector of years.}
+#'   \item{rev_narnia}{A vector of random numbers.}
+#'   \item{count_narnia}{A vector of random numbers.}
+#'   \item{rev_wakanda}{A vector of random numbers.}
+#'   \item{count_wakanda}{A vector of random numbers.}
+#' }
+#' @source Simulated data
+"twocat_data_formatted"