feat(ai): optionally preselect fast or smart model when opening Ask AI (#22679)

Allow front components to preselect the AI model when opening the Ask AI
side panel with a preprompt.

- Add an optional `model: 'FAST' | 'SMART'` to the preprompt in the
  openSidePanelPage AskAI params of the front-component SDK.
- openAskAiPageWithPreprompt resolves FAST to the workspace fast model
  and SMART to the workspace default (null selection = pinned default
  model), writing to agentChatUserSelectedModelState.

packages/twenty-front/src/modules/front-components/hooks/useFrontComponentExecutionContext.ts

@@ -203,6 +203,7 @@ export const useFrontComponentExecutionContext = ({
         openAskAiPageWithPreprompt({
           text: params.preprompt.text,
           mode: params.preprompt.mode,
+          model: params.preprompt.model,
         });
 
         if (params.shouldResetSearchState === true) {