Add demo.tape for VHS to generate demo.gif

VHS tape file to recreate demo.gif with OpenRouter API.
Requires OPENROUTER_API_KEY environment variable to be set.

Usage: vhs demo.tape

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: claude

demo.tape

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+# VHS tape file for generating demo.gif
+# Requires: vhs (https://github.com/charmbracelet/vhs)
+# Usage: vhs demo.tape
+#
+# IMPORTANT: Set OPENROUTER_API_KEY environment variable before running:
+# export OPENROUTER_API_KEY=sk-or-v1-your-key-here
+
+Output demo.gif
+
+Set FontSize 14
+Set Width 1600
+Set Height 800
+Set Theme "Dracula"
+
+# Set up environment variables
+# Note: Using $OPENROUTER_API_KEY from your environment
+Type "export OPENAI_API_KEY=$OPENROUTER_API_KEY"
+Enter
+Sleep 500ms
+
+Type "export LLM_BASE_URL='https://openrouter.ai/api/v1'"
+Enter
+Sleep 500ms
+
+Type "export LLM_MODEL='anthropic/claude-3.5-sonnet'"
+Enter
+Sleep 500ms
+
+# Clear screen
+Type "clear"
+Enter
+Sleep 500ms
+
+# Run jq-by-example
+Type "jq-by-example --task all"
+Enter
+Sleep 20s
+
+# Wait for completion
+Sleep 2s