Object metadata API create one using workspace migration v2 (#13420)

# Introduction
In this PR we create basic transpilation methods and utils to handle
input to flat, entity to flat, object maps to flat. In order to
transpile everything into a common validation that will be implemented
in another PR

## FieldMetadataEntity typing
Added `never | null` to fields that should never be in order to ease
general abstracted method to pass null, as anw it's what is in the
database

## Todo
- ~~Create a feature flag~~
- Integration test for object creation through metadata api + pg col
introspection and snapshoting

packages/twenty-server/src/engine/metadata-modules/object-metadata/dtos/create-object.input.ts

@@ -4,11 +4,16 @@ import { BeforeCreateOne } from '@ptc-org/nestjs-query-graphql';
 import { IsBoolean, IsNotEmpty, IsOptional, IsString } from 'class-validator';
 import GraphQLJSON from 'graphql-type-json';
 import { FieldMetadataType } from 'twenty-shared/types';
+import { trimAndRemoveDuplicatedWhitespacesFromObjectStringProperties } from 'twenty-shared/utils';
+import { v4 } from 'uuid';
 
 import { FieldMetadataSettings } from 'src/engine/metadata-modules/field-metadata/interfaces/field-metadata-settings.interface';
 
+import { UserInputError } from 'src/engine/core-modules/graphql/utils/graphql-errors.util';
 import { IsValidMetadataName } from 'src/engine/decorators/metadata/is-valid-metadata-name.decorator';
+import { FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
 import { BeforeCreateOneObject } from 'src/engine/metadata-modules/object-metadata/hooks/before-create-one-object.hook';
+import { buildDefaultFlatFieldMetadataForCustomObject } from 'src/engine/metadata-modules/object-metadata/utils/build-default-fields-for-custom-object.util';
 
 @InputType()
 @BeforeCreateOne(BeforeCreateOneObject)
@@ -71,6 +76,68 @@ export class CreateObjectInput {
 
   @IsBoolean()
   @IsOptional()
-  @Field({ nullable: true })
+  @Field({ nullable: true }) // Not nullable to me
   isLabelSyncedWithName?: boolean;
 }
+
+export const fromCreateObjectInputToFlatObjectMetadata = (
+  rawCreateObjectInput: CreateObjectInput,
+): FlatObjectMetadata => {
+  if (rawCreateObjectInput.isRemote) {
+    throw new UserInputError('Remote objects are not supported yet');
+  }
+
+  const createObjectInput =
+    trimAndRemoveDuplicatedWhitespacesFromObjectStringProperties(
+      rawCreateObjectInput,
+      [
+        'description',
+        'icon',
+        'labelPlural',
+        'labelSingular',
+        'namePlural',
+        'nameSingular',
+        'shortcut',
+      ],
+    );
+
+  const objectMetadataId = v4();
+  const createdAt = new Date();
+  const baseCustomFlatFieldMetadatas =
+    buildDefaultFlatFieldMetadataForCustomObject({
+      createdAt,
+      objectMetadataId,
+      workspaceId: createObjectInput.workspaceId,
+    });
+
+  return {
+    createdAt,
+    updatedAt: createdAt,
+    dataSourceId: createObjectInput.dataSourceId, // TODO is it enough ?
+    description: createObjectInput.description ?? null,
+    duplicateCriteria: [], // TODO is it enough ?
+    flatFieldMetadatas: Object.values(baseCustomFlatFieldMetadatas),
+    flatIndexMetadatas: [], // TODO is it enough ?
+    icon: createObjectInput.icon ?? null,
+    id: objectMetadataId,
+    imageIdentifierFieldMetadataId: null,
+    isActive: true,
+    isAuditLogged: true,
+    isCustom: true,
+    isLabelSyncedWithName: createObjectInput.isLabelSyncedWithName ?? false,
+    isRemote: false,
+    isSearchable: true,
+    isSystem: false,
+    labelIdentifierFieldMetadataId: baseCustomFlatFieldMetadatas.nameField.id,
+    labelPlural: createObjectInput.labelPlural ?? null,
+    labelSingular: createObjectInput.labelSingular ?? null,
+    namePlural: createObjectInput.namePlural ?? null,
+    nameSingular: createObjectInput.nameSingular ?? null,
+    shortcut: createObjectInput.shortcut ?? null,
+    standardId: null,
+    standardOverrides: null,
+    uniqueIdentifier: objectMetadataId,
+    targetTableName: 'DEPRECATED',
+    workspaceId: createObjectInput.workspaceId,
+  };
+};