Refactor duplicate chapter number formatters

app/src/main/java/eu/kanade/presentation/util/ChapterNumberFormatter.kt

@@ -0,0 +1,13 @@
+package eu.kanade.presentation.util
+
+import java.text.DecimalFormat
+import java.text.DecimalFormatSymbols
+
+private val formatter = DecimalFormat(
+    "#.###",
+    DecimalFormatSymbols().apply { decimalSeparator = '.' },
+)
+
+fun formatChapterNumber(chapterNumber: Float): String {
+    return formatter.format(chapterNumber)
+}