Build detailed Classic and Fluent documentation and redesign homepage

[jogibear9988]

The documentation now provides a complete learning path with 38 chapters and paired Classic/Fluent examples, while the homepage presents the project with a distinct paper-and-rust visual design. The manual covers schema/data operations, runners, CLI and DI, migration types, provider behavior, and deployment practices.

• Add accessible code tabs with a saved preference, copy buttons, chapter search, mobile navigation and readable examples without JavaScript.
• Highlight automatic SQLite reconstruction from live metadata and retain the sourced framework comparison and preservation limits.
• Align README examples and NuGet installation instructions; remove stale release-status caveats while retaining compatibility and provider restrictions.
• Generate committed static pages from maintainable sources, with CI checks for generated output, links and published C# examples. Preserve CI-result rendering during Pages deployment.

Validation: all 106 C# samples compile against the repository; eight Classic/Fluent SQLite schema-parity and reversal checks pass; all 40 HTML pages pass link, anchor and control-reference checks; all five CI-count renderer tests pass. Desktop and mobile browser checks covered keyboard tab switching, preference persistence, copying, search, chapter navigation and table scrolling.

The chapter organization follows FluentMigrator’s documentation, adapted to this API. Visual inspiration and site maintenance instructions are documented in docs/README.md.

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