IIRR-25: add instructions to puzzle form.

Author: ABizzinotto

app/lib/slack_client/views/puzzle_form.rb

@@ -3,6 +3,10 @@ module Views
     class PuzzleForm
       def create
         blocks = Slack::BlockKit.blocks do |blocks|
+          blocks.section do |section|
+            section.mrkdwn text: intro_text
+          end
+
           blocks.input label: "What is the Puzzle question?", block_id: "question" do |input|
             input.plain_text_input action_id: "question", multiline: true
           end
@@ -28,6 +32,16 @@ def create
           modal.close text: "Close"
         end.as_json
       end
+
+      private
+
+      def intro_text
+        <<~TEXT
+          Please provide a puzzle question, the answer, an explanation of the answer, and a link to documentation if applicable.
+
+          When providing the question, please provide ONLY the question text, without any additional introduction (for example, do not include "Is this ruby or rails?"). The bot will add that automatically.
+        TEXT
+      end
     end
   end
 end