Update Documentation

- added screenshot
- added doc export using pandoc to html and pdf

make_doc.bat

@@ -0,0 +1,31 @@
+@echo off
+setlocal enabledelayedexpansion
+
+REM Check dependencies
+where pandoc >nul 2>&1
+if errorlevel 1 (
+    echo ERROR: Pandoc not found in PATH.
+    exit /b 1
+)
+
+echo Generating PDF ...
+pandoc README.md ^
+    --lua-filter="./doc/tools/noexport-subtrees.lua" ^
+    --template="./doc/tools/eisvogel.latex" ^
+    --toc ^
+    --number-sections ^
+    --pdf-engine=xelatex ^
+    -o "./doc/build/Documentation.pdf"
+
+echo Generating HTML ...
+pandoc README.md ^
+    --lua-filter="./doc/tools/noexport-subtrees.lua" ^
+    --template="./doc/tools/bootstrap_menu.html" ^
+    --toc ^
+    --toc-depth=6 ^
+    --standalone ^
+    --embed-resources ^
+    -o "./doc/build/index.html"
+
+echo Done.
+