Add Docsify web viewer and search functionality for PostgreSQL docs

[mathncode-sid]

Pull Request for Issue #20 and #21 : Add Web Viewer and Downloadable PDF with Branding

Description

This PR enhances the repository by improving accessibility and user experience for the existing PostgreSQL documentation.

Features Added

• Web Viewer

  • Markdown files are now rendered in a clean, responsive web view using Docsify.
  • Sidebar navigation is included for easy movement between sections.

• Search Functionality

  • Users can quickly search within the documentation via the search bar.
    This sorts out Issue #21

Files Added

• index.html → main Docsify web viewer.
• _sidebar.md → sidebar navigation for all documentation sections.
• assets/custom.css → custom styling for the Docsify site.

Notes on Downloadable PDF

• Downloadable PDF functionality was explored but could not be fully implemented due to limitations with dynamic Docsify content and hosting constraints.
• For a full PDF with branding, it is recommended to pre-generate the PDF locally using a tool like Puppeteer and include it in the repository, with a link for download in the sidebar or README.

Hosting on GitHub Pages

• With the addition of index.html, the documentation can now be hosted on GitHub Pages.

• To host:

  1. Push the repository to GitHub.
  2. In the repository settings, enable GitHub Pages, typically from the main or gh-pages branch.
  3. Access the hosted site at https://fahimahammed.github.io/learn-postgresql/

• This allows users to view the documentation directly in a web browser without cloning the repo.

Optional Enhancements for Future

• Dark mode for web viewer.
• Automatic Table of Contents generation from markdown headers.
• Versioning support for different documentation updates.

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This PR lays the foundation for a more interactive, accessible, and professional documentation experience, following the proposal outlined in Issue #20 and Issue #21

Screenshot