Prevent csv export injections (#14347)

**Small Security Issue:** CSV exports were vulnerable to formula
injection attacks when users entered values starting with =, +, -, or @.
(only happens if a logged-in user injects corrupted data)

Solution:
- Added ZWJ (Zero-Width Joiner) protection that prefixes dangerous
values with invisible Unicode character
- This is the best way to preserve original data while preventing Excel
from executing formulas
- Added import cleanup to restore original values when re-importing
 
Changes:
- New sanitizeValueForCSVExport() function for security
- Updated all CSV export paths to use both security + formatting
functions
- Added comprehensive tests covering attack vectors and international
characters
- Also added cursor rules for better code consistency

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-front/src/modules/settings/data-model/components/SettingsDataModelNewFieldBreadcrumbDropDown.tsx

@@ -1,4 +1,5 @@
 import { type SettingsFieldType } from '@/settings/data-model/types/SettingsFieldType';
+import { SettingsPath } from '@/types/SettingsPath';
 import { Dropdown } from '@/ui/layout/dropdown/components/Dropdown';
 import { DropdownContent } from '@/ui/layout/dropdown/components/DropdownContent';
 import { DropdownMenuItemsContainer } from '@/ui/layout/dropdown/components/DropdownMenuItemsContainer';
@@ -7,7 +8,6 @@ import { useTheme } from '@emotion/react';
 import styled from '@emotion/styled';
 import { t } from '@lingui/core/macro';
 import { useLocation, useParams, useSearchParams } from 'react-router-dom';
-import { SettingsPath } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 import { IconChevronDown } from 'twenty-ui/display';
 import { Button } from 'twenty-ui/input';