Add word counting script + call it in .latexmkrc

wordcount.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Relative paths
+cd -- "$(dirname -- "${BASH_SOURCE[0]}")"
+
+wordcount=$(pdftotext .out/thesis.pdf - | wc -w)
+timestamp=$(date +%FT%T%:z)
+
+if [[ ! -s wordcounts.csv ]]; then
+    printf 'date,wordcount\n' >> wordcounts.csv
+fi
+printf '%s,%s\n' "$timestamp" "${wordcount//[[:space:]]/}" >> wordcounts.csv