Update demo video to start from fully typed first card

Use HTML video tag with autoplay for demo in README

Update demo video link to renamed upload

Add demo poster image and clickable video thumbnail in README

Add demo video to README

Add API quota section to README

Bump version to 0.3.0 for purl-based multi-ecosystem scoring

Add purl-based scoring for PyPI, Go, and Cargo ecosystems (#15)

Bump plugin.json version to 0.2.2 to match release tag

Fix hook self-blocking for bootstrap.sh invocations

Fix hook self-blocking when running evaluate subcommand

Add file-based token fallback for headless environments

Update plugin.json version to 0.2.0 and description for multi-ecosystem

Bump version to 0.2.0 for multi-ecosystem release

Add multi-ecosystem examples to README