plot_cont_sim: Plot trajectory of continuous trait simulation
In Caetanods/buddPhy: Trait Evolution and Budding Speciation

Function plots the trajectory of a single continuous trait evolving along the branches of the tree following a lineage-age dependent process including events of budding (or symmetric) speciation.

plot_cont_sim(
  sim_obj,
  edge_width = 1.5,
  bg = "white",
  jump_col = "coral",
  jump_width = 1,
  main = "",
  legend = TRUE
)

`sim_obj`	the output of a 'buddPhy' simulation function.
`edge_width`	the width of the lines
`bg`	the color for the background of the plot. Helps to visualize some colors. Use "white" to turn it off.
`jump_col`	the color of the line connecting the states for the nodes in which a phenotype jump happened after budding speciation.
`jump_width`	the line width for the jump lines.
`main`	a title for the plot.
`legend`	if to add a legend. Note that legend can get in the way of the plot sometimes.