Make new vignette to show how to make custom tidySEM layout (maybe make another vignette about that?)
Update image in full workflow tutorial
All extraction functions: provide both standardized and unstandardized coefficients, as well as the 95% CI.
lavaan_cov: rename r to covariance, σ(x, y) (“3C3”), or just covariance for simplicity if people are not likely to understand that.
Create new function: lavaan_cor (then keep r but remove residual covariances)
Add 95% confidence intervals whenever possible
nice_tidySEM: improve algorithm when odd number of variables for layout matrix by adding two empty rows around the odd levels, and one empty row in the middle of the even levels.
