Refactor app in to its own slice

slices/main/views/posts/archive.rb

@@ -0,0 +1,21 @@
+module Main
+  module Views
+    module Posts
+      class Archive< Main::View
+        include Deps["repos.post_repo"]
+
+        expose :year do |year:|
+          year
+        end
+
+        expose :posts do |year:|
+          post_repo.by_year(year: year).map { |post| Decorators::Posts::Decorator.new(post) }
+        end
+
+        expose :post_years do
+          post_repo.post_years.map { |py| py[:year].to_i }
+        end
+      end
+    end
+  end
+end