chore: add TokenLens sources and ignore rules

NativeTokenLens/Sources/TokenLensCore/TokenFormatter.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+public enum TokenFormatter {
+    public static func format(_ value: Int) -> String {
+        if value >= 100_000_000 {
+            return adaptive(Double(value) / 100_000_000) + "亿"
+        }
+        if value >= 10_000 {
+            return adaptive(Double(value) / 10_000) + "万"
+        }
+        return String(value)
+    }
+
+    private static func adaptive(_ value: Double) -> String {
+        let integerDigits = String(Int(abs(value.rounded(.towardZero)))).count
+        let digits = integerDigits > 3 ? 1 : 3
+        return String(format: "%.\(digits)f", value)
+    }
+}