Add Jekyll-based GitHub Pages site with core sections

[Copilot]

Creates a minimal GitHub Pages site for the OR-toolkit organization with About/Mission, Projects, Participation, and Contact sections.

Changes

• Jekyll setup: Added _config.yml with Minima theme and Gemfile for dependencies
• Homepage: Created index.md with:
  • Mission statement describing research-oriented OR tools focus
  • Projects section highlighting Column Generation and Stochastic Programming repos
  • Participation guidelines for contributors
  • Contact information (email, GitHub org)
• Build config: .gitignore excludes Jekyll build artifacts and vendor dependencies

Preview

Site will deploy automatically via GitHub Pages when merged to main.

Original prompt

simple Jekyll-based github page
org is research-oriented, but independent, you could include:

• About / Mission: What your projects aim to do
• Projects: Highlight your main repos (Column Generation, Stochastic Programming)
• Participation: How people can contribute
• Contact: Your email or other channels

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