Dev/astro migration

[mag1cfrog]

This pull request migrates the project from a Jekyll-based setup to an Astro-based static site generator. The changes include setting up Astro configurations, workflows, and components, as well as removing Jekyll-specific files and configurations. The most important changes are grouped into themes below.

Migration to Astro

• Added a new astro.config.mjs file to configure the Astro project with MDX, sitemap integration, and site-specific settings like base URL and output type. (astro.config.mjs, astro.config.mjsR1-R12)
• Introduced a new package.json file with Astro dependencies and scripts for development, building, and previewing the site. (package.json, package.jsonR1-R18)
• Created reusable Astro components such as BaseHead, Header, Footer, and FormattedDate for site-wide metadata, navigation, and layout. (src/components/BaseHead.astro, [1]; src/components/Header.astro, [2]; src/components/Footer.astro, [3]; src/components/FormattedDate.astro, [4]

GitHub Pages Deployment Workflow

• Added a new GitHub Actions workflow (deploy.yml) to automate deployment of the Astro site to GitHub Pages. (.github/workflows/deploy.yml, .github/workflows/deploy.ymlR1-R31)

Development Environment Enhancements

• Configured VS Code with recommended extensions for Astro and MDX, and added a launch configuration for running the Astro development server. (.vscode/extensions.json, [1]; .vscode/launch.json, [2]

Removal of Jekyll Setup

• Deleted Jekyll-specific configuration files (Gemfile, _config.yml) and assets, including CSS and layout files. (docs/Gemfile, [1]; docs/_config.yml, [2]; docs/assets/css/style.css, [3]; docs/index.html, [4]

Documentation Updates

• Added a new README.md file tailored for the Astro-based project, including setup instructions, project structure, and commands. (README.md, README.mdR1-R68)