Add cli-demo-generator skill (9th skill)

- Created comprehensive CLI demo generation skill with VHS automation
- Three approaches: automated, batch, and interactive recording
- Smart timing based on command complexity
- Complete documentation with VHS syntax reference and best practices
- Templates and examples for quick start
- Updated marketplace.json to v1.3.0
- Updated README.md and README.zh-CN.md with new skill
- Added to CHANGELOG.md

Skill features:
- auto_generate_demo.py: Automated generation from command lists
- batch_generate.py: Batch processing with YAML/JSON configs
- record_interactive.sh: Interactive recording with asciinema
- VHS tape file templates and examples
- 346-line SKILL.md following Anthropic best practices
- Grade A- in best practices review

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

cli-demo-generator/scripts/record_interactive.sh

@@ -0,0 +1,136 @@
+#!/bin/bash
+#
+# Record interactive CLI demos using asciinema and convert to GIF
+#
+# Usage:
+#   record_interactive.sh output.gif
+#   record_interactive.sh output.gif --theme Dracula --width 1200
+#
+
+set -e
+
+# Colors
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+# Default values
+OUTPUT=""
+THEME="Dracula"
+WIDTH=1400
+HEIGHT=700
+FONT_SIZE=16
+
+# Parse arguments
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        --theme)
+            THEME="$2"
+            shift 2
+            ;;
+        --width)
+            WIDTH="$2"
+            shift 2
+            ;;
+        --height)
+            HEIGHT="$2"
+            shift 2
+            ;;
+        --font-size)
+            FONT_SIZE="$2"
+            shift 2
+            ;;
+        *)
+            OUTPUT="$1"
+            shift
+            ;;
+    esac
+done
+
+if [ -z "$OUTPUT" ]; then
+    echo -e "${RED}Error: Output file required${NC}" >&2
+    echo "Usage: $0 output.gif [--theme Theme] [--width 1200] [--height 700]"
+    exit 1
+fi
+
+# Check dependencies
+if ! command -v asciinema &> /dev/null; then
+    echo -e "${RED}Error: asciinema not installed${NC}" >&2
+    echo "Install it with:"
+    echo "  macOS: brew install asciinema"
+    echo "  Linux: sudo apt install asciinema"
+    exit 1
+fi
+
+if ! command -v vhs &> /dev/null; then
+    echo -e "${RED}Error: VHS not installed${NC}" >&2
+    echo "Install it with: brew install vhs"
+    exit 1
+fi
+
+# Generate temp files
+CAST_FILE="${OUTPUT%.gif}.cast"
+TAPE_FILE="${OUTPUT%.gif}.tape"
+
+echo -e "${GREEN}===========================================================${NC}"
+echo -e "${GREEN}Interactive Demo Recording${NC}"
+echo -e "${GREEN}===========================================================${NC}"
+echo ""
+echo -e "${YELLOW}Instructions:${NC}"
+echo "1. Type your commands naturally"
+echo "2. Press ENTER after each command"
+echo "3. Press Ctrl+D when finished"
+echo ""
+echo -e "${YELLOW}Output:${NC} $OUTPUT"
+echo -e "${YELLOW}Theme:${NC} $THEME"
+echo -e "${YELLOW}Size:${NC} ${WIDTH}x${HEIGHT}"
+echo ""
+echo -e "${GREEN}Starting recording in 3 seconds...${NC}"
+sleep 3
+echo ""
+
+# Record with asciinema
+asciinema rec "$CAST_FILE"
+
+echo ""
+echo -e "${GREEN}✓ Recording saved to: $CAST_FILE${NC}"
+echo ""
+echo -e "${YELLOW}Converting to GIF...${NC}"
+
+# Convert asciinema cast to VHS tape format
+cat > "$TAPE_FILE" << EOF
+Output $OUTPUT
+
+Set FontSize $FONT_SIZE
+Set Width $WIDTH
+Set Height $HEIGHT
+Set Theme "$THEME"
+Set Padding 20
+
+Play $CAST_FILE
+EOF
+
+echo -e "${GREEN}✓ Generated tape file: $TAPE_FILE${NC}"
+
+# Generate GIF with VHS
+vhs < "$TAPE_FILE"
+
+if [ -f "$OUTPUT" ]; then
+    FILE_SIZE=$(du -h "$OUTPUT" | cut -f1)
+    echo ""
+    echo -e "${GREEN}===========================================================${NC}"
+    echo -e "${GREEN}✓ Demo generated successfully!${NC}"
+    echo -e "${GREEN}===========================================================${NC}"
+    echo -e "${YELLOW}Output:${NC} $OUTPUT"
+    echo -e "${YELLOW}Size:${NC} $FILE_SIZE"
+    echo ""
+    echo "Generated files:"
+    echo "  - $CAST_FILE (asciinema recording)"
+    echo "  - $TAPE_FILE (VHS tape file)"
+    echo "  - $OUTPUT (GIF demo)"
+    echo ""
+else
+    echo -e "${RED}✗ Failed to generate GIF${NC}" >&2
+    exit 1
+fi