docs: add comprehensive documentation for MCP project

- Create comprehensive documentation structure using MkDocs
- Add markdown files for API reference, architecture, getting started, and troubleshooting
- Configure GitHub Pages deployment workflow
- Include custom Jekyll and MkDocs configurations
- Add custom styling and layout for documentation site

docs/Gemfile

@@ -0,0 +1,13 @@
+source "https://rubygems.org"
+
+gem "github-pages", group: :jekyll_plugins
+gem "jekyll-theme-minimal"
+gem "jekyll-relative-links"
+gem "jekyll-seo-tag"
+
+# 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"
+  gem "tzinfo-data"
+end