Add overview slides and cleanup bib

remove_unused_bibentries.sh

@@ -0,0 +1,53 @@
+#!/bin/sh
+
+# Path to your .bib file
+BIBFILE="assets/library.bib"
+
+# Step 1: Extract all citation keys from the .bib file
+# This assumes keys follow immediately after @...{KEY,
+bibkeys=$(grep -oP '^@\w+\{\K[^,]+' "$BIBFILE")
+
+# Step 2: Initialize array for unused keys
+unused=()
+
+for key in $bibkeys; do
+    if ! grep -qr "$key" . --include="*.qmd"; then
+        unused+=("$key")
+    fi
+done
+
+if [ ${#unused[@]} -eq 0 ]; then
+    echo "All citation keys are used."
+else
+    echo "Unused citation keys:"
+    for key in "${unused[@]}"; do
+        echo "  $key"
+    done
+fi
+
+# Step 5: Optional removal
+if [ ${#unused[@]} -gt 0 ]; then
+    echo "Removing unused entries from $BIBFILE..."
+
+    awk -v keys="${unused[*]}" '
+        BEGIN {
+            split(keys, klist);
+            for (i in klist) unused[klist[i]] = 1;
+            skip = 0;
+        }
+        /^[[:space:]]*@/ {
+            match($0, /^@\w+\{([^,]+),/, m);
+            if (m[1] && unused[m[1]]) {
+                skip = 1;
+                next;
+            }
+        }
+        skip && /^\s*}/ {
+            skip = 0;
+            next;
+        }
+        !skip
+    ' "$BIBFILE" > "$BIBFILE.tmp" && mv "$BIBFILE.tmp" "$BIBFILE"
+
+    echo "Done."
+fi