Create save dashboard record action (#14665)

Closes https://github.com/twentyhq/core-team-issues/issues/1502

- Created the save action
- Removed the temporary data attribute from the page layout widget since
we will connect widgets to real data soon



https://github.com/user-attachments/assets/2b46b511-f2c2-4e11-873c-a76fd31704e5

packages/twenty-server/src/engine/core-modules/page-layout/dtos/inputs/update-page-layout-with-tabs.input.ts

@@ -6,6 +6,7 @@ import {
   IsArray,
   IsEnum,
   IsNotEmpty,
+  IsOptional,
   IsString,
   IsUUID,
   ValidateNested,
@@ -27,8 +28,9 @@ export class UpdatePageLayoutWithTabsInput {
   @IsNotEmpty()
   type: PageLayoutType;
 
-  @Field(() => UUIDScalarType)
+  @Field(() => UUIDScalarType, { nullable: true })
   @IsUUID()
+  @IsOptional()
   objectMetadataId: string | null;
 
   @Field(() => [UpdatePageLayoutTabWithWidgetsInput])