Add Bengali Numerals (#4997)

Co-authored-by: Laurenz <laurmaedje@gmail.com>

crates/typst/src/model/numbering.rs

@@ -299,6 +299,8 @@ pub enum NumberingKind {
     EasternArabicPersian,
     /// Devanagari numerals.
     DevanagariNumber,
+    /// Bengali numerals.
+    BengaliNumber,
     /// Circled numbers (①, ②, ③, etc.), up to 50.
     CircledNumber,
     /// Double-circled numbers (⓵, ⓶, ⓷, etc.), up to 10.
@@ -324,6 +326,7 @@ impl NumberingKind {
             '\u{0661}' => NumberingKind::EasternArabic,
             '\u{06F1}' => NumberingKind::EasternArabicPersian,
             '\u{0967}' => NumberingKind::DevanagariNumber,
+            '\u{09E7}' => NumberingKind::BengaliNumber,
             '①' => NumberingKind::CircledNumber,
             '⓵' => NumberingKind::DoubleCircledNumber,
             _ => return None,
@@ -349,6 +352,7 @@ impl NumberingKind {
             Self::EasternArabic => '\u{0661}',
             Self::EasternArabicPersian => '\u{06F1}',
             Self::DevanagariNumber => '\u{0967}',
+            Self::BengaliNumber => '\u{09E7}',
             Self::CircledNumber => '①',
             Self::DoubleCircledNumber => '⓵',
         }
@@ -561,6 +565,7 @@ impl NumberingKind {
             Self::EasternArabic => decimal('\u{0660}', n),
             Self::EasternArabicPersian => decimal('\u{06F0}', n),
             Self::DevanagariNumber => decimal('\u{0966}', n),
+            Self::BengaliNumber => decimal('\u{09E6}', n),
             Self::CircledNumber => zeroless::<50>(
                 |x| {
                     [

tests/suite/model/numbering.typ

@@ -45,6 +45,11 @@
 #t(pat: "\u{0967}", 10, "१०")
 #t(pat: "\u{0967}", 123456789, "१२३४५६७८९")
 
+// Bengali.
+#t(pat: "\u{09E7}", 1, "১")
+#t(pat: "\u{09E7}", 10, "১০")
+#t(pat: "\u{09E7}", 123456789, "১২৩৪৫৬৭৮৯")
+
 // Circled number.
 #t(pat: "①", 1, "①")
 #t(pat: "①", 50, "㊿")