feat: add lingui/no-unlocalized-strings ESLint rule and fix translations (#16610)

## Summary
This PR adds the `lingui/no-unlocalized-strings` ESLint rule to detect
untranslated strings and fixes translation issues across multiple
components.

## Changes

### ESLint Configuration (`eslint.config.react.mjs`)
- Added comprehensive `ignore` patterns for non-translatable strings
(CSS values, HTML attributes, technical identifiers)
- Added `ignoreNames` for props that don't need translation (className,
data-*, aria-*, etc.)
- Added `ignoreFunctions` for console methods, URL APIs, and other
non-user-facing functions
- Disabled rule for debug files, storybook, and test files

### Components Fixed (~19 files)
- Object record components (field inputs, pickers, merge dialogs)
- Settings components (accounts, admin panel)
- Serverless function components
- Record table and title cell components

## Status
🚧 **Work in Progress** - ~124 files remaining to fix

This PR is being submitted as draft to allow progressive fixing of
remaining translation issues.

## Testing
- Run `npx eslint "src/**/*.tsx"` in `packages/twenty-front` to check
remaining issues

packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsBlocklistInput.tsx

@@ -96,7 +96,7 @@ export const SettingsAccountsBlocklistInput = ({
             render={({ field: { value, onChange }, fieldState: { error } }) => (
               <SettingsTextInput
                 instanceId="settings-accounts-blocklist-input"
-                placeholder="eddy@gmail.com, @apple.com"
+                placeholder={t`eddy@gmail.com, @apple.com`}
                 value={value}
                 onChange={onChange}
                 error={error?.message}

packages/twenty-front/src/modules/settings/accounts/components/SettingsAccountsCalendarChannelsGeneral.tsx

@@ -58,7 +58,7 @@ export const SettingsAccountsCalendarChannelsGeneral = () => {
     description: '',
     isCanceled: false,
     location: '',
-    title: 'Onboarding call',
+    title: t`Onboarding call`,
     visibility: CalendarChannelVisibility.SHARE_EVERYTHING,
   };
 

packages/twenty-front/src/modules/settings/accounts/components/message-folders/SettingsMessageFoldersTreeItem.tsx

@@ -1,3 +1,4 @@
+import { t } from '@lingui/core/macro';
 import { type MessageFolder } from '@/accounts/types/MessageFolder';
 import { SettingsAccountsMessageFolderIcon } from '@/settings/accounts/components/message-folders/SettingsAccountsMessageFolderIcon';
 
@@ -127,7 +128,7 @@ export const SettingsMessageFoldersTreeItem = ({
           <StyledExpandButton
             isExpanded={isExpanded}
             onClick={handleExpandToggle}
-            aria-label={isExpanded ? 'Collapse folder' : 'Expand folder'}
+            aria-label={isExpanded ? t`Collapse folder` : t`Expand folder`}
           >
             <IconChevronRight size={16} />
           </StyledExpandButton>