refactor: OpenAI integration (#996)

- Add `OpenAIResponse` to trim the `<think>...</think>` block
- Add an `Enable Streaming` option to fix the issue that some services do not support streaming output

Signed-off-by: leo <longshuang@msn.cn>

src/Views/Preferences.axaml

@@ -616,6 +616,10 @@
                              Text="{Binding GenerateSubjectPrompt, Mode=TwoWay}"
                              AcceptsReturn="true"
                              TextWrapping="Wrap"/>
+
+                    <CheckBox Margin="0,12,0,0"
+                              Content="{DynamicResource Text.Preferences.AI.Streaming}"
+                              IsChecked="{Binding Streaming, Mode=TwoWay}"/>
                   </StackPanel>
                 </DataTemplate>
               </ContentControl.DataTemplates>