Merge branch '4-include-the-plugin-into-template-s-rubygems-file' into 'master'

Added new components that should be shared

Closes #4

See merge request core-services/jekyll-theme-lcsb-frozen-components!5

lib/jekyll-theme-lcsb-frozen-components.rb

+require 'jekyll/tags/alert'
+require 'jekyll/tags/alert_header'
 require 'jekyll/tags/rblock'
 require 'jekyll/tags/rgridblock'
 require 'jekyll/tags/rtitle'

lib/jekyll/tags/alert.rb

+module Jekyll
+  module Tags
+    class AlertTag < Liquid::Block
+      def initialize(tag_name, block_options, liquid_options)
+        super
+        @class = block_options.strip
+      end
+
+      def render(context)
+        context.stack do
+          context["class"] = @class
+          @content = super
+        end
+        output = <<~EOS
+            <div class="alert #{@class}">
+              #{@content}
+            </div>
+        EOS
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('alert', Jekyll::Tags::AlertTag)

lib/jekyll/tags/alert_header.rb

+module Jekyll
+  module Tags
+    class AlertHeaderTag < Liquid::Block
+      def initialize(tag_name, block_options, liquid_options)
+        super
+      end
+
+      def render(context)
+        context.stack do
+          @content = super
+        end
+        output = "<h3>#{@content}</h3>"
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('alert_header', Jekyll::Tags::AlertHeaderTag)