This pull request enhances the curl-runner documentation site by improving discoverability, navigation, and SEO, as well as adding new content and refining existing descriptions. Key changes include the addition of structured data for search engines, new sections highlighting configuration alternatives, an expanded "Next Steps" area, and the introduction of a "Tutorial Coming Soon" page. Several metadata descriptions have also been clarified for conciseness.

Content & Navigation Improvements

• Added a new "Configuration Alternatives" section to the CLI Commands page, explaining how CLI options can be set via environment variables or global YAML configuration, with links to relevant docs.
• Added an "Alternative Configuration Methods" section to the Global Settings page, showing users how to override settings via environment variables or CLI options, with direct links.
• Expanded the "Next Steps" section on the main documentation page to four columns, added "Tutorials" and refined the "Use Cases" and "Examples" cards for better guidance and clarity. [1] [2] [3]
• Added a new "Tutorial Coming Soon" page under /docs/tutorials/coming-soon, previewing upcoming content and providing alternative resource links for users.

SEO & Structured Data

• Added structured data components (SoftwareDocumentationSchema, DocumentationArticleSchema, BreadcrumbSchema) to the main documentation and quick start pages to improve SEO and search engine visibility. [1] [2] [3] [4]

Metadata & Description Refinements

• Improved and clarified metadata descriptions for CLI Options, Advanced Examples, Collection Examples, Output Formats, and Retry Mechanism documentation pages for better search relevance and conciseness. [1] [2] [3] [4] [5]