Add Jekyll-based GitHub Pages site with core sections

.gitignore

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+_site/
+.sass-cache/
+.jekyll-cache/
+.jekyll-metadata
+vendor/
+Gemfile.lock
+.bundle/

Gemfile

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+source "https://rubygems.org"
+
+gem "jekyll", "~> 4.3"
+gem "minima", "~> 2.5"
+
+group :jekyll_plugins do
+  gem "jekyll-feed", "~> 0.12"
+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", :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: OR-toolkit
+description: Operations Research Toolkit - A collection of tools and libraries for optimization problems
+url: "https://or-toolkit.github.io"
+baseurl: ""
+
+# Build settings
+markdown: kramdown
+theme: minima
+
+# Exclude from processing
+exclude:
+  - README.md
+  - Gemfile
+  - Gemfile.lock

index.md

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+---
+layout: default
+title: Home
+---
+
+# OR-toolkit
+
+## About / Mission
+
+OR-toolkit is a research-oriented organization dedicated to developing and maintaining high-quality tools and libraries for Operations Research and optimization problems. Our mission is to provide accessible, efficient, and well-documented implementations of advanced optimization techniques that can be used by researchers, students, and practitioners alike.
+
+We focus on creating modular, extensible solutions that address real-world optimization challenges while maintaining academic rigor and practical applicability.
+
+---
+
+## Projects
+
+Our main repositories showcase different aspects of optimization and Operations Research:
+
+### Column Generation
+Advanced algorithms and tools for solving large-scale optimization problems using column generation techniques. This project provides efficient implementations of Dantzig-Wolfe decomposition and cutting-stock problem solvers.
+
+**Repository:** [Column Generation](https://github.com/OR-toolkit/Column-Generation)
+
+### Stochastic Programming
+Tools and frameworks for modeling and solving optimization problems under uncertainty. Includes scenario generation, stochastic decomposition methods, and sample average approximation techniques.
+
+**Repository:** [Stochastic Programming](https://github.com/OR-toolkit/Stochastic-Programming)
+
+---
+
+## Participation
+
+We welcome contributions from the community! Here's how you can get involved:
+
+### How to Contribute
+
+1. **Report Issues:** If you find bugs or have feature requests, please open an issue in the relevant repository
+2. **Submit Pull Requests:** We welcome code contributions. Please ensure your code follows our coding standards and includes appropriate tests
+3. **Documentation:** Help us improve our documentation by fixing errors or adding examples
+4. **Spread the Word:** Star our repositories and share them with others who might benefit
+
+### Getting Started
+
+- Browse our repositories and find something that interests you
+- Read the README and CONTRIBUTING guidelines in each repository
+- Start with "good first issue" labels if you're new to the project
+- Join discussions and ask questions
+
+---
+
+## Contact
+
+For questions, collaboration opportunities, or general inquiries, please reach out:
+
+- **Email:** [or-toolkit@example.com](mailto:or-toolkit@example.com)
+- **GitHub:** [OR-toolkit Organization](https://github.com/OR-toolkit)
+
+We're always interested in hearing about how you're using our tools or ideas for new features!
+
+---
+
+<div style="text-align: center; margin-top: 2em; color: #666;">
+  <small>© 2024 OR-toolkit. All rights reserved.</small>
+</div>