feat: Add awesome GitHub Pages site with modern Jekyll setup

- Beautiful homepage with gradient hero section and feature grid
- Comprehensive examples page showcasing SigmOS capabilities
- Custom styling with responsive design and syntax highlighting
- Automated GitHub Actions deployment workflow
- SEO optimized with proper meta tags and sitemap

Author: copyleftdev

.github/workflows/pages.yml

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+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.1'
+          bundler-cache: true
+          cache-version: 0
+      
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v4
+      
+      - name: Build with Jekyll
+        run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
+        env:
+          JEKYLL_ENV: production
+      
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

Gemfile

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+source "https://rubygems.org"
+
+gem "jekyll", "~> 4.3.0"
+gem "minima", "~> 2.5"
+
+group :jekyll_plugins do
+  gem "jekyll-feed", "~> 0.12"
+  gem "jekyll-sitemap"
+  gem "jekyll-seo-tag"
+end
+
+# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+# and associated library.
+platforms :mingw, :x64_mingw, :mswin, :jruby do
+  gem "tzinfo", ">= 1", "< 3"
+  gem "tzinfo-data"
+end
+
+# Performance-booster for watching directories on Windows
+gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+
+# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
+# do not have a Java counterpart.
+gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]

_config.yml

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+# Site settings
+title: "SigmOS"
+description: "A next-generation Domain-Specific Language (DSL) designed to define, orchestrate, and execute AI-native, composable, reactive, and multimodal systems."
+baseurl: ""
+url: "https://copyleftdev.github.io/sigmos"
+
+# Build settings
+markdown: kramdown
+highlighter: rouge
+theme: minima
+plugins:
+  - jekyll-feed
+  - jekyll-sitemap
+  - jekyll-seo-tag
+
+# Navigation
+header_pages:
+  - index.md
+  - docs/user-guide.md
+  - docs/developer-guide.md
+  - docs/api-reference.md
+  - examples.md
+
+# GitHub
+github_username: copyleftdev
+repository: copyleftdev/sigmos
+
+# SEO
+author: "Lead Sigma"
+twitter:
+  username: copyleftdev
+  card: summary_large_image
+
+# Collections
+collections:
+  examples:
+    output: true
+    permalink: /:collection/:name/
+
+# Defaults
+defaults:
+  - scope:
+      path: ""
+      type: "posts"
+    values:
+      layout: "post"
+  - scope:
+      path: ""
+      type: "examples"
+    values:
+      layout: "example"
+
+# Syntax highlighting
+kramdown:
+  syntax_highlighter: rouge
+  syntax_highlighter_opts:
+    css_class: 'highlight'
+    span:
+      line_numbers: false
+    block:
+      line_numbers: true
+
+# Exclude from processing
+exclude:
+  - Gemfile
+  - Gemfile.lock
+  - node_modules
+  - vendor/bundle/
+  - vendor/cache/
+  - vendor/gems/
+  - vendor/ruby/
+  - target/
+  - crates/
+  - src/
+  - tests/
+  - Cargo.toml
+  - Cargo.lock