Update instructions on LuaLaTeX and LaTeX Workshop in VS Code/Codium

Makefile

@@ -12,6 +12,7 @@ clean:
 	@rm -rf temp/*
 	@rm -f main-{script,exercises,solutions}.{aux,loc,log,out,pdf,soc,toc,synctex.gz}
 	@rm -f exercises/*/*.{aux,loc,log,out,pdf,soc,toc,synctex.gz}
+	@rm -f install-verification/*.{aux,loc,log,out,pdf,soc,toc,synctex.gz}
 
 # Compile listings (only needed when listings have changed)
 listings: listings/**/*

docs/faq.md

@@ -5,6 +5,7 @@
   - [Error: “File \`latex-logo.png' not found: using draft setting.”](#error-file-latex-logopng-not-found-using-draft-setting)
   - [Error: “Unable to find xyz.sty”](#error-unable-to-find-xyzsty)
   - [I accidentally dismissed the prompt asking me to install a missing package.](#i-accidentally-dismissed-the-prompt-asking-me-to-install-a-missing-package)
+  - [MikTeX Console is already running](#miktex-console-is-already-running)
   - [I want to use my own tools.](#i-want-to-use-my-own-tools)
   - [I need more help.](#i-need-more-help)
 
@@ -36,18 +37,22 @@ The compiler complains that a package, particularly the corresponding .sty docum
 
 Try re-opening $\TeX$studio. If this does not help, there is still the option to manually install the required packages from the Mik$\TeX$ Console or similar distribution-specific management software.
 
+## MikTeX Console is already running
+
+If this error occurs while opening the MikTeX Console, open the Task Manager, search for “MikTeX Console”, select the entry in the table, and terminate the task by a click on the respective button. Then, open MikTeX Console again. 
+
 ## I want to use my own tools.
 
 Sure, feel free. We provide instructions for [CoCalc](./cocalc-instructions.md) and [VS Code/Codium](./vs-code-instructions.md). Any other editor will do if you know your ways around the terminal. In essence, all we do here is this:
 
 ```bash
-pdflatex main.tex
+lualatex main.tex
 biber main
-pdflatex main.tex
-pdflatex main.tex
+lualatex main.tex
+lualatex main.tex
 ```
 
-Just run `pdflatex main.tex` twice if you do not have any citations. Or have a look at XeTeX, LuaTeX, … ([numerous other tools available](https://www.tug.org/interest.html#free)).
+Just run `pdflatex main.tex` twice if you do not have any citations. Or have a look at XeTeX, … ([numerous other tools available](https://www.tug.org/interest.html#free)).
 
 ## I need more help.
 

docs/vs-code-instructions.md

@@ -13,7 +13,7 @@ LaTeX Workshop uses so-called recipes to compile documents. A recipe refers to a
 
 1. Launch the VS Code settings and search for “recipes.”
 2. In the “Latex-workshop > LaTeX: Recipes” section, click on “Edit in settings.json.”
-3. Go ahead and add the following two entries to the list. The first one just uses the `pdflatex` compiler twice to build our document, whereas the second one adds an intermediate round of `biber` compilation.
+3. Go ahead and add the following two entries to the list. The first one just uses the `pdflatex` compiler twice to build our document, whereas the second one adds an intermediate round of `biber` compilation and changes the LaTeX compiler to `lualatex`.
 
 ```json
 "latex-workshop.latex.recipes": [
@@ -25,12 +25,12 @@ LaTeX Workshop uses so-called recipes to compile documents. A recipe refers to a
         ]
     },
     {
-        "name": "pdflatex -> biber -> pdflatex × 2",
+        "name": "lualatex -> biber -> lualatex × 2",
         "tools": [
-            "pdflatex",
+            "lualatex",
             "biber",
-            "pdflatex",
-            "pdflatex"
+            "lualatex",
+            "lualatex"
         ]
     },
     // EXISTING ENTRIES GO HERE
@@ -51,6 +51,17 @@ LaTeX Workshop uses so-called recipes to compile documents. A recipe refers to a
         ],
         "env": {}
     },
+    {
+        "name": "lualatex",
+        "command": "lualatex",
+        "args": [
+            "-synctex=1",
+            "-interaction=nonstopmode",
+            "-file-line-error",
+            "%DOC%"
+        ],
+        "env": {}
+    },
     // EXISTING ENTRIES GO HERE
 ]
 ```
@@ -67,13 +78,15 @@ LaTeX Workshop uses so-called recipes to compile documents. A recipe refers to a
 
 ## Some useful notes
 
-+ LaTeX Workshop will always try to compile the file your cursor is currently in. If you are working in sub-files, then this will result in errors. You can **specify the document root** by adding a magic TeX root comment. Press `Ctrl + Shift + P` and select “Insert !TeX magic root command.” Then simply select your root document and compile again. We provided these comments for you in all exercise files:
++ LaTeX Workshop has a [process of deciding which file to compile](https://github.com/James-Yu/LaTeX-Workshop/wiki/Compile#latex-workshoplatexbuildforceRecipeUsage). Unfortunately, our project archive tends to confuse the plugin, resulting in compiler errors. You can **specify the document root** by adding a magic TeX root comment. We provided these comments for you in all exercise files:
 
-```tex
+```
 % !TeX root = ../../main-exercises.tex
 ```
 
-This plugin offers a couple of other handy features:
++ However, by default, **LaTeX Workshop ignores them** because they may pose a security threat if you cannot trust the project you are compiling. See [this issue](https://github.com/James-Yu/LaTeX-Workshop/issues/3027) for more details. To enable them anyway, go to your settings and deactivate the “Force Recipe Usage” checkbox.
+
+The **LaTeX Workshop** plugin offers a couple of other handy features:
 
 + Sometimes, it is helpful to kill all compiler processes and **clean up the auxiliary files** afterwards.
 + If you need to **find a certain section** in the PDF or in the source document, you can use the “Navigate, select and edit” menu.

praeamble.tex

@@ -1,3 +1,4 @@
+% !TeX root = ./main-exercises.tex
 \documentclass[a4paper,english]{report}
 
 % Language and font encoding