Set up GitHub Pages compatibility with new Gemfile and scripts

- Updated Gemfile for GitHub Pages compatibility, including necessary gems.
- Added Gemfile.github-pages for specific GitHub Pages dependencies.
- Created scripts to switch between GitHub Pages and local development setups.
- Introduced GitHub Actions workflow for building and deploying the Jekyll site to GitHub Pages.

switch-to-local-dev.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Script to switch back to local development setup
+
+echo "Switching to local development setup..."
+
+# Use local development Gemfile
+cp Gemfile.local-dev Gemfile
+
+echo "✅ Switched to local development setup"
+echo ""
+echo "To install dependencies:"
+echo "  bundle install"
+echo ""
+echo "To run locally:"
+echo "  bundle exec jekyll serve"