Precompile all packages in preface.qmd wit output=false

Author: juliohm

preface.qmd

@@ -1,3 +1,7 @@
+---
+engine: julia
+---
+
 # Preface {.unnumbered}
 
 ## Who this book is for
@@ -128,6 +132,16 @@ pkg"add PairPlots@3.0.3"
 pkg"add DataFrames@1.8.1"
 ```
 
+```{julia}
+#| echo: false
+#| output: false
+import GeoStats
+import GeoIO
+import CairoMakie
+import PairPlots
+import DataFrames
+```
+
 If you need to reproduce the exact same environment with
 fixed versions of indirect dependencies, please download the
 [Project.toml](https://github.com/JuliaEarth/geospatial-data-science-with-julia/blob/main/Project.toml) and