Allow editing of posts

slices/admin/actions/posts/update.rb

@@ -0,0 +1,14 @@
+module Admin
+  module Actions
+    module Posts
+      class Update < Action
+        include Deps["commands.posts.update"]
+
+        def handle(req, res)
+          update.(params: req.params)
+          res.redirect "/admin/posts/#{req.params[:id]}"
+        end
+      end
+    end
+  end
+end