hugo: add post-process script to flatten markdown files

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

hack/flatten-markdown.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+set -e
+
+# Flatten markdown files from public/path/to/page/index.md to public/path/to/page.md
+# This makes markdown output links work correctly
+
+PUBLIC_DIR="${1:-public}"
+
+[ -d "$PUBLIC_DIR" ] || { echo "Error: Directory $PUBLIC_DIR does not exist"; exit 1; }
+
+find "$PUBLIC_DIR" -type f -name 'index.md' | while read -r file; do
+  # Skip the root index.md
+  [ "$file" = "$PUBLIC_DIR/index.md" ] && continue
+
+  # Get the directory containing index.md
+  dir="${file%/*}"
+
+  # Move index.md to parent directory with directory name
+  mv "$file" "${dir%/*}/${dir##*/}.md"
+done
+
+echo "Flattened markdown files in $PUBLIC_DIR"