RICH_TEXT_V2 backend (#9848)

- Add RICH_TEXT_V2 composite type to backend.
- Add `bodyV2` field to tasks and notes.
- Minimum required frontend changes to avoid errors when creating a note

[Testing
instructions](https://github.com/twentyhq/twenty/pull/9690#issuecomment-2602378218)

---------

Co-authored-by: ad-elias <elias@autodiligence.com>
Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>

packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts

@@ -75,6 +75,11 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: true,
       },
+      {
+        key: FeatureFlagKey.IsRichTextV2Enabled,
+        workspaceId: workspaceId,
+        value: false,
+      },
       {
         key: FeatureFlagKey.IsNewRelationEnabled,
         workspaceId: workspaceId,