feat(i18n): add current plural category accessor

Co-Authored-By: Virgil <virgil@lethean.io>

localise.go

@@ -105,6 +105,14 @@ func CurrentDirection() TextDirection {
 // IsRTL returns true if the current language uses right-to-left text.
 func IsRTL() bool { return Direction() == DirRTL }
 
+// CurrentPluralCategory returns the plural category for the current default language.
+func CurrentPluralCategory(n int) PluralCategory {
+	if svc := Default(); svc != nil {
+		return svc.PluralCategory(n)
+	}
+	return GetPluralCategory("en", n)
+}
+
 func detectLanguage(supported []language.Tag) string {
 	langEnv := os.Getenv("LANG")
 	if langEnv == "" {

localise_test.go

@@ -218,6 +218,28 @@ func TestIsRTL_Good(t *testing.T) {
 	assert.False(t, IsRTL(), "English should not be RTL")
 }
 
+// --- Package-level CurrentPluralCategory ---
+
+func TestCurrentPluralCategory_Good(t *testing.T) {
+	prev := Default()
+	t.Cleanup(func() {
+		SetDefault(prev)
+	})
+
+	svc, err := New()
+	require.NoError(t, err)
+	SetDefault(svc)
+
+	assert.Equal(t, PluralOther, CurrentPluralCategory(0))
+	assert.Equal(t, PluralOne, CurrentPluralCategory(1))
+	assert.Equal(t, PluralOther, CurrentPluralCategory(2))
+
+	require.NoError(t, SetLanguage("fr"))
+	assert.Equal(t, PluralOne, CurrentPluralCategory(0))
+	assert.Equal(t, PluralOne, CurrentPluralCategory(1))
+	assert.Equal(t, PluralOther, CurrentPluralCategory(2))
+}
+
 // --- detectLanguage ---
 
 func TestDetectLanguage_Good(t *testing.T) {