Add pretty_print support for Ruby's pp library

Implement pretty_print methods for AI::Chat and AI::Response to provide
clean output with Ruby's built-in pp command. Features:
- Truncates long message content to 80 characters
- Hides sensitive instance variables (@api_key, @client)
- Displays objects with proper notation and indentation
- Works alongside amazing_print for maximum flexibility

Author: raghubetina

lib/ai/chat.rb

@@ -181,6 +181,37 @@ def inspect
       "#<#{self.class.name} @messages=#{messages.inspect} @model=#{@model.inspect} @schema=#{@schema.inspect} @reasoning_effort=#{@reasoning_effort.inspect}>"
     end
 
+    # Support for Ruby's pp (pretty print)
+    def pretty_print(q)
+      q.group(1, "#<#{self.class}", '>') do
+        q.breakable
+        
+        # Show messages with truncation
+        q.text "@messages="
+        truncated_messages = @messages.map do |msg|
+          truncated_msg = msg.dup
+          if msg[:content].is_a?(String) && msg[:content].length > 80
+            truncated_msg[:content] = msg[:content][0..77] + "..."
+          end
+          truncated_msg
+        end
+        q.pp truncated_messages
+        
+        # Show other instance variables (except sensitive ones)
+        skip_vars = [:@messages, :@api_key, :@client]
+        instance_variables.sort.each do |var|
+          next if skip_vars.include?(var)
+          value = instance_variable_get(var)
+          unless value.nil?
+            q.text ","
+            q.breakable
+            q.text "#{var}="
+            q.pp value
+          end
+        end
+      end
+    end
+
 
     private
 

lib/ai/response.rb

@@ -9,5 +9,16 @@ def initialize(response)
       @total_tokens = @usage[:total_tokens]
     end
 
+    # Support for Ruby's pp (pretty print)
+    def pretty_print(q)
+      q.group(1, "#<#{self.class}", '>') do
+        instance_variables.sort.each_with_index do |var, i|
+          q.breakable
+          q.text "#{var}="
+          q.pp instance_variable_get(var)
+          q.text "," if i < instance_variables.length - 1
+        end
+      end
+    end
   end
 end