Feat/email composer improvements (#23188)

- Move composer to dedicated page
- Add test email option
- Auto saved as draft can be revisited from `objects/messageCampaigns`
later
- Campaign stats component



https://github.com/user-attachments/assets/9e523116-e79b-496d-9c9d-3887e0c9213f



<!-- This is an auto-generated description by cubic. -->
<a
href="https://cubic.dev/pr/twentyhq/twenty/pull/23188?utm_source=github"
target="_blank" rel="noopener noreferrer"
data-no-image-dialog="true"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img
alt="Review in cubic"
src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a>
<!-- End of auto-generated description by cubic. -->

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-server/src/engine/workspace-manager/workspace-migration/workspace-migration-runner/action-handlers/page-layout-widget/services/utils/from-universal-configuration-to-flat-page-layout-widget-configuration.util.ts

@@ -360,6 +360,8 @@ export const fromUniversalConfigurationToFlatPageLayoutWidgetConfiguration = ({
     case WidgetConfigurationType.IFRAME:
     case WidgetConfigurationType.STANDALONE_RICH_TEXT:
     case WidgetConfigurationType.EMAIL_THREAD:
+    case WidgetConfigurationType.MESSAGE_CAMPAIGN_BODY:
+    case WidgetConfigurationType.MESSAGE_CAMPAIGN_DETAILS:
       return universalConfiguration;
   }
 };