Add trips

app/repos/post_repo.rb

@@ -207,7 +207,7 @@ module Adamantium
       def fetch!(slug)
         posts
           .published
-          .combine(:tags)
+          .combine(:tags, :trips)
           .where(slug: slug)
           .one!
       end

app/repos/trip_repo.rb

@@ -0,0 +1,18 @@
+module Adamantium
+  module Repos
+    class TripRepo < Adamantium::Repo[:trips]
+      def fetch!(id)
+        trips
+          .where(id: id)
+          .combine(posts: :tags)
+          .one!
+      end
+
+      def list
+        trips
+          .order(:start_date)
+          .to_a
+      end
+    end
+  end
+end