docs: improve README and fix configuration reference

[wcollins]

Description

Rewrites the README with a concise layout, embedded terminal GIF demos, and streamlined quick-start instructions. Also fixes a broken markdown link in the configuration reference.

Type of Change

• Documentation update

Changes Made

• Add terminal GIF demos (version, workflow, output formats) with VHS tape source files
• Rewrite README with condensed layout, feature table, and GIF examples
• Fix broken [Application Settings} markdown link in docs/configuration-reference.md

Testing

• Verify GIFs render correctly in the README on GitHub
• Verify the Application Settings link in docs/configuration-reference.md navigates correctly

Checklist

• Code follows the project's style guidelines
• Self-review of code has been performed
• Commits follow conventional format
• No secrets or credentials committed