fix: Enable Lingui recommended rules and fix all translation violations (#14133)

- Enable lingui/no-single-variables-to-translate and all other
recommended Lingui rules
- Fix single variable translation patterns (t`${variable}` → variable)
- Fix expression-in-message violations by extracting variables
- Fix t-call-in-function violations by moving translations inside
functions
- Update ESLint configs to use linguiPlugin.configs['flat/recommended']
- Clean up unused imports and improve translation patterns

packages/twenty-server/src/engine/metadata-modules/utils/constants/metadata-name-flat-metadata-validators.constants.ts

@@ -1,4 +1,4 @@
-import { t } from '@lingui/core/macro';
+import { msg } from '@lingui/core/macro';
 import camelCase from 'lodash.camelcase';
 
 import { type FlatMetadataValidator } from 'src/engine/metadata-modules/types/flat-metadata-validator.type';
@@ -11,26 +11,26 @@ import { STARTS_WITH_LOWER_CASE_AND_CONTAINS_ONLY_CAPS_AND_LOWER_LETTERS_AND_NUM
 
 export const METADATA_NAME_VALIDATORS: FlatMetadataValidator<string>[] = [
   {
-    message: t`Name is too long`,
+    message: msg`Name is too long`,
     validator: (name) => exceedsDatabaseIdentifierMaximumLength(name),
   },
   {
-    message: t`Name is too short`,
+    message: msg`Name is too short`,
     validator: (name) => beneathDatabaseIdentifierMinimumLength(name),
   },
   {
-    message: t`Name should be in camelCase`,
+    message: msg`Name should be in camelCase`,
     validator: (name) => name !== camelCase(name),
   },
   {
-    message: t`Name is not valid: it must start with lowercase letter and contain only alphanumeric letters`,
+    message: msg`Name is not valid: it must start with lowercase letter and contain only alphanumeric letters`,
     validator: (name) =>
       !name.match(
         STARTS_WITH_LOWER_CASE_AND_CONTAINS_ONLY_CAPS_AND_LOWER_LETTERS_AND_NUMBER_STRING_REGEX,
       ),
   },
   {
-    message: t`The name is not available`,
+    message: msg`The name is not available`,
     validator: (name) => RESERVED_METADATA_NAME_KEYWORDS.includes(name),
   },
 ];