feat(medcat-service): Medcat Demo and AnonCAT demo uplift in Gradio

[alhendrickson]

• feat(medcat-service): Demo page can now click annotations to view details
• feat(medcat-service): Create AnonCAT demo page
• style(medcat-service): Improve page formatting and display
• build(medcat-service): Update gradio and fastapi version
• refactor(medcat-service): Put example text into its own text files

Screenshots

Before

After

After: Anoncat demo

Split into two tabs to show details. First tab should be at least as good as existing one