feat: scenario agents & runner (#11944)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>

Gemfile

@@ -179,7 +179,10 @@ gem 'reverse_markdown'
 
 gem 'iso-639'
 gem 'ruby-openai'
-gem 'ai-agents', '>= 0.2.1'
+gem 'ai-agents', '>= 0.4.3'
+
+# TODO: Move this gem as a dependency of ai-agents
+gem 'ruby_llm-schema'
 
 gem 'shopify_api'