feat(front): add search to the language picker (#22095)

## What

Adds a search bar to the **Settings → Experience → Language** picker,
and makes languages searchable across languages.

Each option is matched against:
- its displayed label (the name in the current UI language)
- its name **in English** — typing `chinese` finds "Chinois — Simplifié"
- its **native name** — typing `中文` finds the same option

Matching is also accent-insensitive (`francais` finds "Français").

## How

- The shared `Select` already supports search via `withSearchInput`
(used by the currency/country pickers) — the picker just opts in.
- Cross-language matching uses the platform `Intl.DisplayNames` API to
derive each language's English and native names — no hardcoded
translation tables, no extra requests.
- A generic optional `searchKeywords` field on `SelectOption` lets the
`Select` filter match synonyms on top of the label; the filter now runs
through the existing `normalizeSearchText`, hence the
accent-insensitivity. Behavior is unchanged for every existing `Select`
(strict superset for ASCII labels).

## Test

- `nx typecheck` / `nx lint` pass for `twenty-front` and `twenty-ui`.
- Open the Language dropdown and try `chinese`, `中文`, or `francais`.


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packages/twenty-front/src/modules/ui/input/components/Select.tsx

@@ -23,6 +23,7 @@ import { type IconComponent } from 'twenty-ui/icon';
 import { type SelectOption } from 'twenty-ui/input';
 import { MenuItem, MenuItemSelect } from 'twenty-ui/navigation';
 import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { normalizeSearchText } from '~/utils/normalizeSearchText';
 
 export type SelectSizeVariant = 'small' | 'default';
 
@@ -124,15 +125,20 @@ export const Select = <Value extends SelectValue>({
     return null;
   }, [emptyOption, options, pinnedOption, value]);
 
-  const filteredOptions = useMemo(
-    () =>
-      searchInputValue
-        ? options.filter(({ label }) =>
-            label.toLowerCase().includes(searchInputValue.toLowerCase()),
-          )
-        : options,
-    [options, searchInputValue],
-  );
+  const filteredOptions = useMemo(() => {
+    if (!isNonEmptyString(searchInputValue)) {
+      return options;
+    }
+
+    const normalizedSearch = normalizeSearchText(searchInputValue);
+
+    return options.filter(
+      ({ label, searchKeywords }) =>
+        normalizeSearchText(label).includes(normalizedSearch) ||
+        (isDefined(searchKeywords) &&
+          normalizeSearchText(searchKeywords).includes(normalizedSearch)),
+    );
+  }, [options, searchInputValue]);
 
   const isDisabled =
     disabledFromProps ||