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/flat-field-metadata/services/flat-field-metadata-type-validator.service.ts

@@ -150,12 +150,14 @@ export class FlatFieldMetadataTypeValidatorService {
       ];
 
     if (!isDefined(fieldMetadataTypeValidator)) {
+      const fieldType = flatFieldMetadataToValidate.type;
+
       return [
         {
           code: FieldMetadataExceptionCode.UNCOVERED_FIELD_METADATA_TYPE_VALIDATION,
-          message: `Unsupported field metadata type ${flatFieldMetadataToValidate.type}`,
-          value: flatFieldMetadataToValidate.type,
-          userFriendlyMessage: t`Unsupported field metadata type ${flatFieldMetadataToValidate.type}`,
+          message: `Unsupported field metadata type ${fieldType}`,
+          value: fieldType,
+          userFriendlyMessage: t`Unsupported field metadata type ${fieldType}`,
         },
       ];
     }