Add twenty/folder-structure custom oxlint rule (#18467)

## Summary

- Re-implements `eslint-plugin-project-structure`'s folder structure
enforcement as a custom oxlint rule (`twenty/folder-structure`),
recovering functionality lost during the ESLint → Oxlint migration
- Validates `src/modules/` structure: kebab-case module folder names,
allowed subdirectories (hooks, utils, components, states, types,
graphql, etc.), hook file naming (`use{PascalCase}.(ts|tsx)`), util file
naming (`{camelCase}.(ts|tsx)`), and module nesting depth (max 4 levels)
- Enabled as `"warn"` in twenty-front with 403 pre-existing violations
to address incrementally

## What the rule checks

| Check | Example valid | Example invalid |
|-------|-------------|-----------------|
| Module names kebab-case | `object-record/` | `graphWidgetBarChart/` |
| Allowed subdirs only | `hooks/`, `components/`, `utils/` |
`random-stuff/` |
| Hook file naming | `useMyHook.ts` | `badName.ts` |
| Util file naming | `buildQuery.ts` | `build-query.ts` |
| Max nesting depth 4 | `a/b/c/d/hooks/` | `a/b/c/d/e/hooks/` |
| Utils kebab-case subfolders | `utils/cron-to-human/` |
`utils/camelCase/` |

## Pre-existing violations (403 total)

| Category | Count | Examples |
|----------|-------|---------|
| Non-kebab-case module names | 160 | `graphWidgetBarChart`,
`AIChatThreads` |
| Module depth > 4 | 215 |
`settings/roles/role-permissions/object-level-permissions/field-permissions`
|
| Util file naming | 22 | `.util.ts` suffix, kebab-case, PascalCase
filenames |
| Misc (hooks, tests) | 6 | Non-hook files in hooks/, folders in test
dirs |

packages/twenty-front/src/modules/settings/data-model/fields/forms/components/SettingsDataModelFieldIsUniqueForm.tsx

@@ -3,7 +3,7 @@ import { Controller, useFormContext } from 'react-hook-form';
 import { useFieldMetadataItemById } from '@/object-metadata/hooks/useFieldMetadataItemById';
 import { useObjectMetadataItem } from '@/object-metadata/hooks/useObjectMetadataItem';
 import { SettingsOptionCardContentSelect } from '@/settings/components/SettingsOptions/SettingsOptionCardContentSelect';
-import { canBeUnique } from '@/settings/data-model/fields/forms/utils/canBeUnique.util';
+import { canBeUnique } from '@/settings/data-model/fields/forms/utils/canBeUnique';
 import { t } from '@lingui/core/macro';
 import { type FieldMetadataType } from 'twenty-shared/types';
 import { IconKey } from 'twenty-ui/display';

packages/twenty-front/src/modules/settings/data-model/fields/forms/components/SettingsDataModelFieldOnClickActionForm.tsx

@@ -2,7 +2,7 @@ import { Controller, useFormContext } from 'react-hook-form';
 
 import { useFieldMetadataItemById } from '@/object-metadata/hooks/useFieldMetadataItemById';
 import { SettingsOptionCardContentSelect } from '@/settings/components/SettingsOptions/SettingsOptionCardContentSelect';
-import { getSettingsDataModelFieldOnClickActionDescription } from '@/settings/data-model/fields/forms/utils/getSettingsDataModelFieldOnClickActionDescription.util';
+import { getSettingsDataModelFieldOnClickActionDescription } from '@/settings/data-model/fields/forms/utils/getSettingsDataModelFieldOnClickActionDescription';
 import { type SettingsDataModelFieldOnClickActionFormValues } from '@/settings/data-model/fields/forms/utils/settingsDataModelFieldOnClickActionSchema';
 import { Select } from '@/ui/input/components/Select';
 import { useLingui } from '@lingui/react/macro';

packages/twenty-front/src/modules/settings/data-model/fields/forms/components/SettingsDataModelFieldSettingsFormCard.tsx

@@ -30,7 +30,7 @@ import { SettingsDataModelFieldPreviewWidget } from '@/settings/data-model/field
 import { Separator } from '@/settings/components/Separator';
 import { SettingsDataModelFieldOnClickActionForm } from '@/settings/data-model/fields/forms/components/SettingsDataModelFieldOnClickActionForm';
 import { SettingsDataModelFieldRelationFormCard } from '@/settings/data-model/fields/forms/morph-relation/components/SettingsDataModelFieldRelationFormCard';
-import { mergeSettingsSchemas } from '@/settings/data-model/fields/forms/utils/mergeSettingsSchema.util';
+import { mergeSettingsSchemas } from '@/settings/data-model/fields/forms/utils/mergeSettingsSchema';
 import { settingsDataModelFieldMaxValuesSchema } from '@/settings/data-model/fields/forms/utils/settingsDataModelFieldMaxValuesSchema';
 import { settingsDataModelFieldOnClickActionSchema } from '@/settings/data-model/fields/forms/utils/settingsDataModelFieldOnClickActionSchema';
 import { useFormContext } from 'react-hook-form';

packages/twenty-front/src/modules/settings/data-model/fields/forms/phones/components/SettingsDataModelFieldPhonesForm.tsx

@@ -3,7 +3,7 @@ import { Controller, useFormContext } from 'react-hook-form';
 import { useFieldMetadataItemById } from '@/object-metadata/hooks/useFieldMetadataItemById';
 import { phonesSchema as phonesFieldDefaultValueSchema } from '@/object-record/record-field/ui/types/guards/isFieldPhonesValue';
 import { SettingsOptionCardContentSelect } from '@/settings/components/SettingsOptions/SettingsOptionCardContentSelect';
-import { mergeSettingsSchemas } from '@/settings/data-model/fields/forms/utils/mergeSettingsSchema.util';
+import { mergeSettingsSchemas } from '@/settings/data-model/fields/forms/utils/mergeSettingsSchema';
 import { settingsDataModelFieldMaxValuesSchema } from '@/settings/data-model/fields/forms/utils/settingsDataModelFieldMaxValuesSchema';
 import { settingsDataModelFieldOnClickActionSchema } from '@/settings/data-model/fields/forms/utils/settingsDataModelFieldOnClickActionSchema';
 import { countryCodeToCallingCode } from '@/settings/data-model/fields/preview/utils/getPhonesFieldPreviewValue';

packages/twenty-front/src/modules/settings/data-model/object-details/components/SettingsUpdateDataModelObjectAboutForm.tsx

@@ -1,7 +1,7 @@
 import { useUpdateOneObjectMetadataItem } from '@/object-metadata/hooks/useUpdateOneObjectMetadataItem';
 import { type ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataItem';
 import { isObjectMetadataReadOnly } from '@/object-record/read-only/utils/isObjectMetadataReadOnly';
-import { computeUpdatedNavigationMemorizedUrlAfterObjectNamePluralChange } from '@/settings/data-model/object-details/utils/computeUpdatedNavigationMemorizedUrlAfterObjectNamePluralChange.util';
+import { computeUpdatedNavigationMemorizedUrlAfterObjectNamePluralChange } from '@/settings/data-model/object-details/utils/computeUpdatedNavigationMemorizedUrlAfterObjectNamePluralChange';
 import { SettingsDataModelObjectAboutForm } from '@/settings/data-model/objects/forms/components/SettingsDataModelObjectAboutForm';
 import {
   type SettingsDataModelObjectAboutFormValues,