Add note about build step

Changing these files and forgetting about the filesAfter.txt and filesBefore.txt is a big risk for firsttimers.

The note is a pretty easy ensurance to add, so that people remember that part.

Author: Splaxi

templates/PSFProject/þnameþ/internal/scripts/postimport.ps1

@@ -1,4 +1,5 @@
 # Add all things you want to run after importing the main code
+# If you add entries to this file, you aslo need to edit the .\build\filesAfter.txt
 
 # Load Configurations
 foreach ($file in (Get-ChildItem "$ModuleRoot\internal\configurations\*.ps1" -ErrorAction Ignore)) {

templates/PSFProject/þnameþ/internal/scripts/preimport.ps1

@@ -1 +1,2 @@
-# Add all things you want to run before importing the main code
+# Add all things you want to run before importing the main code
+# If you add entries to this file, you also need to edit the .\build\filesBefore.txt