feat: Import 35+ skills, merge duplicates, add openclaw installer

Major updates:
- Added 35+ new skills from awesome-opencode-skills and antigravity repos
- Merged SEO skills into seo-master
- Merged architecture skills into architecture
- Merged security skills into security-auditor and security-coder
- Merged testing skills into testing-master and testing-patterns
- Merged pentesting skills into pentesting
- Renamed website-creator to thai-frontend-dev
- Replaced skill-creator with github version
- Removed Chutes references (use MiniMax API instead)
- Added install-openclaw-skills.sh for cross-platform installation
- Updated .env.example with MiniMax API credentials

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"