feat(serializer): 添加将Oklch颜色序列化为十六进制字符串的功能

color-module/src/foreign_serializer.rs

@@ -0,0 +1,12 @@
+use palette::Oklch;
+use serde::Serializer;
+
+use crate::convert::map_oklch_to_srgb_hex;
+
+pub fn serialize_oklch_to_hex<S>(color: &Oklch, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    let hex_color = map_oklch_to_srgb_hex(color);
+    serializer.serialize_str(&hex_color)
+}