Add srgb transform.

[AFeiYA]

Re: #

Changelog

• Add srgb transform for Class Color.

---

Continuous Integration

This pull request:

• [ ] needs automatic test cases check.

  Manual trigger with @cocos-robot run test cases afterward.

• [ ] does not change any runtime related code or build configuration

  If any reviewer thinks the CI checks are needed, please uncheck this option, then close and reopen the issue.

---

Compatibility Check

This pull request:

• [ ] changes public API, and have ensured backward compatibility with deprecated features.
• [ ] affects platform compatibility, e.g. system version, browser version, platform sdk version, platform toolchain, language version, hardware compatibility etc.
• [ ] affects file structure of the build package or build configuration which requires user project upgrade.
• [ ] introduces breaking changes, please list all changes, affected features and the scope of violation.

[github-actions[bot]]

Interface Check Report

! WARNING this pull request has changed these public interfaces:

@@ -11817,8 +11817,29 @@
              * @zh 设置颜色值
              */
             static set<Out extends IColorLike>(out: Out, r: number, g: number, b: number, a: number): Out;
             /**
+             * @en Convert 8bit color to Vec4
+             * @zh 将当前颜色转换为到 Vec4
+             * @returns Vec4 as float color value
+             * @example
+             * ```
+             * const color = Color.YELLOW;
+             * color.toVec4();
+             * ```
+             */
+            static toVec4(color: Color, out?: Vec4): Vec4;
+            /**
+             * @en Set 8bit Color from Vec4
+             * @zh 使用 Vec4 设置 8 bit 颜色
+             * @returns 8 Bit srgb value
+             * @example
+             * ```
+             * color.fromVec4(new Vec4(1,1,1,1));
+             * ```
+             */
+            static fromVec4(value: Vec4, out?: Color): Color;
+            /**
              * @en Converts the hexadecimal formal color into rgb formal and save the results to out color.
              * @zh 从十六进制颜色字符串中读入颜色到 out 中
              */
             static fromHEX<Out extends IColorLike>(out: Out, hexString: string): Out;