Plot a comparison of two runs of qpgraph or two runs of qpadm

`plot_comparison(out1, out2, name1 = NULL, name2 = NULL)`

- out1
First model

- out2
Second model

- name1
Optional name for first model

- name2
Optional name for second model

A ggplot object.

```
fit1 = qpgraph(example_f2_blocks, example_graph, lsqmode = FALSE)
fit2 = qpgraph(example_f2_blocks, example_graph, lsqmode = TRUE)
plot_comparison(fit1, fit2)
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
#> Warning: The following aesthetics were dropped during statistical transformation: label
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#> the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#> variable into a factor?
```