Improve test tooling (#18259)

## Summary

Unifies test mocking tooling across Jest and Storybook, replaces
handcrafted mock data with auto-generated server-fetched data, and
restructures the mock data generation script for maintainability.

### Mock data generation

- Split `generate-mock-data.ts` into three focused modules under
`scripts/mock-data/`:
  - `utils.ts` — shared authentication, GraphQL client, and file writer
  - `generate-metadata.ts` — fetches object metadata from `/metadata`
- `generate-record-data.ts` — fetches record data from `/graphql` using
metadata-driven dynamic queries
- The orchestrator (`generate-mock-data.ts`) authenticates once and
passes the token to both generators
- Company records are now fetched from the actual server (limited to 10
records) instead of being handcrafted
- Generated files are organized under `generated/metadata/objects/` and
`generated/data/companies/`

### Unified test utilities

- Consolidated Jest and MSW mocking into shared utilities that compose
production code (`prefillRecord`, `getRecordNodeFromRecord`,
`getRecordConnectionFromRecords`) with mock metadata
- Renamed `generateEmptyJestRecordNode` → `generateMockRecordNode` and
moved to `testing/utils/`
- Extracted `generateMockRecordConnection` into its own file
- Removed `sanitizeInputForPrefill` workaround (no longer needed with
correctly shaped generated data)

packages/twenty-front/src/modules/object-metadata/utils/mapFieldMetadataToGraphQLQuery.ts

@@ -1,12 +1,15 @@
 import { mapObjectMetadataToGraphQLQuery } from '@/object-metadata/utils/mapObjectMetadataToGraphQLQuery';
-import { FieldMetadataType, RelationType } from '~/generated-metadata/graphql';
 
 import { type FieldMetadataItem } from '@/object-metadata/types/FieldMetadataItem';
 import { type ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
 import { getObjectPermissionsForObject } from '@/object-metadata/utils/getObjectPermissionsForObject';
 import { type RecordGqlFields } from '@/object-record/graphql/record-gql-fields/types/RecordGqlFields';
 import { isNonCompositeField } from '@/object-record/object-filter-dropdown/utils/isNonCompositeField';
-import { type ObjectPermissions } from 'twenty-shared/types';
+import {
+  FieldMetadataType,
+  type ObjectPermissions,
+  RelationType,
+} from 'twenty-shared/types';
 import { computeMorphRelationFieldName, isDefined } from 'twenty-shared/utils';
 
 type MapFieldMetadataToGraphQLQueryArgs = {