Docs readme and local convenience (#19)

* Add README with local serving instructions and convenience rakefile

* update contributor based on main repo

* only run bundle install if needed

Author: jgumbley

README.md

@@ -0,0 +1,26 @@
+# Roo Code Docs
+
+## Prerequisites
+
+Before running the documentation locally, ensure you have:
+- Ruby installed (2.5.0 or higher recommended)
+- Bundler gem installed (`gem install bundler`)
+
+## Local Development
+
+To build and serve the documentation locally:
+
+```bash
+rake serve
+```
+
+The documentation will be available at http://127.0.0.1:4000
+
+## Contributing
+
+We love community contributions! Here's how to get involved:
+
+1. Check Issues & Requests: See open issues or feature requests.
+2. Fork & branch off main.
+3. Submit a Pull Request once your documentation feature or fix is ready.
+4. Join our Reddit community and Discord for feedback, tips, and announcements.

Rakefile

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+desc 'Build documentation site locally'
+task :serve do
+  Dir.chdir('docs') do
+    # Only run bundle install if Gemfile.lock doesn't exist
+    sh 'bundle install' unless File.exist?('Gemfile.lock')
+    sh 'bundle exec jekyll serve'
+  end
+end
+
+# Set default task
+task default: :serve