Add exceptions for metadata modules (#6070)

Class exception for each metadata module + handler to map on graphql
error

TODO left :
- find a way to call handler on auto-resolvers nestjs query (probably
interceptors)
- discuss what should be done for pre-hooks errors
- discuss what should be done for Unauthorized exception

packages/twenty-server/src/engine/metadata-modules/relation-metadata/relation-metadata.resolver.ts

@@ -7,6 +7,7 @@ import { RelationMetadataService } from 'src/engine/metadata-modules/relation-me
 import { Workspace } from 'src/engine/core-modules/workspace/workspace.entity';
 import { RelationMetadataDTO } from 'src/engine/metadata-modules/relation-metadata/dtos/relation-metadata.dto';
 import { DeleteOneRelationInput } from 'src/engine/metadata-modules/relation-metadata/dtos/delete-relation.input';
+import { relationMetadataGraphqlApiExceptionHandler } from 'src/engine/metadata-modules/relation-metadata/utils/relation-metadata-graphql-api-exception-handler.util';
 
 @UseGuards(JwtAuthGuard)
 @Resolver()
@@ -20,9 +21,13 @@ export class RelationMetadataResolver {
     @Args('input') input: DeleteOneRelationInput,
     @AuthWorkspace() { id: workspaceId }: Workspace,
   ) {
-    return this.relationMetadataService.deleteOneRelation(
-      input.id,
-      workspaceId,
-    );
+    try {
+      return this.relationMetadataService.deleteOneRelation(
+        input.id,
+        workspaceId,
+      );
+    } catch (error) {
+      relationMetadataGraphqlApiExceptionHandler(error);
+    }
   }
 }