feat(Chat+Rails): Add with_context method to change configuration during a conversation

Author: crmne

lib/ruby_llm/active_record/acts_as.rb

@@ -133,6 +133,11 @@ def with_temperature(...)
         self
       end
 
+      def with_context(...)
+        to_llm.with_context(...)
+        self
+      end
+
       def on_new_message(...)
         to_llm.on_new_message(...)
         self

lib/ruby_llm/chat.rb

@@ -71,6 +71,13 @@ def with_temperature(temperature)
       self
     end
 
+    def with_context(context)
+      @context = context
+      @config = context.config
+      with_model(@model.id, provider: @provider.slug, assume_exists: true)
+      self
+    end
+
     def on_new_message(&block)
       @on[:new_message] = block
       self