FEATURE: Add Revise... option for queued post reviewable (#23454)

This commit adds a new Revise... action that can be taken
for queued post reviewables. This will open a modal where
the user can select a Reason from a preconfigured list
(or by choosing Other..., a custom reason) and provide feedback
to the user about their post.

The post will be rejected still, but a PM will also be sent to
the user so they have an opportunity to improve their post when
they resubmit it.

spec/models/reviewable_queued_post_spec.rb

@@ -125,6 +125,61 @@ RSpec.describe ReviewableQueuedPost, type: :model do
         end
       end
 
+      context "with revise_and_reject_post" do
+        it "doesn't create the post the user intended" do
+          post_count = Post.public_posts.count
+          result = reviewable.perform(moderator, :revise_and_reject_post)
+          expect(result.success?).to eq(true)
+          expect(result.created_post).to be_nil
+          expect(Post.public_posts.count).to eq(post_count)
+        end
+
+        it "creates a private message to the creator of the post" do
+          args = { revise_reason: "Duplicate", revise_feedback: "This is old news" }
+          expect { reviewable.perform(moderator, :revise_and_reject_post, args) }.to change {
+            Topic.where(archetype: Archetype.private_message).count
+          }
+
+          topic = Topic.where(archetype: Archetype.private_message).last
+          expect(topic.title).to eq(
+            I18n.t(
+              "system_messages.reviewable_queued_post_revise_and_reject.subject_template",
+              topic_title: reviewable.topic.title,
+            ),
+          )
+          translation_params = {
+            username: reviewable.target_created_by.username,
+            topic_title: reviewable.topic.title,
+            topic_url: reviewable.topic.url,
+            reason: args[:revise_reason],
+            feedback: args[:revise_feedback],
+            original_post: reviewable.payload["raw"],
+            site_name: SiteSetting.title,
+          }
+          expect(topic.first_post.raw.chomp).to eq(
+            I18n.t(
+              "system_messages.reviewable_queued_post_revise_and_reject.text_body_template",
+              translation_params,
+            ).chomp,
+          )
+        end
+
+        it "supports sending a custom revise reason" do
+          args = {
+            revise_reason: "Other...",
+            revise_feedback: "This is old news",
+            revise_custom_reason: "Boring",
+          }
+          expect { reviewable.perform(moderator, :revise_and_reject_post, args) }.to change {
+            Topic.where(archetype: Archetype.private_message).count
+          }
+          topic = Topic.where(archetype: Archetype.private_message).last
+
+          expect(topic.first_post.raw).not_to include("Other...")
+          expect(topic.first_post.raw).to include("Boring")
+        end
+      end
+
       context "with delete_user" do
         it "deletes the user and rejects the post" do
           other_reviewable =