update: add minimax-docx skill and sync docs

skills/minimax-docx/scripts/doc_to_docx.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+usage() {
+  echo "Usage: $(basename "$0") <file.doc> [output_directory]"
+  echo "Convert .doc to .docx using LibreOffice."
+  exit 1
+}
+
+if [ $# -lt 1 ]; then
+  usage
+fi
+
+INPUT="$1"
+OUTDIR="${2:-.}"
+
+if [ ! -f "$INPUT" ]; then
+  echo "Error: File not found: $INPUT"
+  exit 1
+fi
+
+if ! command -v soffice &>/dev/null; then
+  echo "Error: soffice (LibreOffice) is required for .doc conversion but not found."
+  echo "Install LibreOffice: brew install --cask libreoffice"
+  exit 1
+fi
+
+BASENAME=$(basename "$INPUT" .doc)
+mkdir -p "$OUTDIR"
+
+echo "Converting: $INPUT -> $OUTDIR/$BASENAME.docx"
+soffice --headless --convert-to docx --outdir "$OUTDIR" "$INPUT" >/dev/null 2>&1
+
+OUTPUT="$OUTDIR/$BASENAME.docx"
+if [ ! -f "$OUTPUT" ]; then
+  echo "Error: Conversion failed. Output file not created: $OUTPUT"
+  exit 1
+fi
+
+echo "Success: $OUTPUT"