docs: update README (#12)

Author: chenjiahan

README.md

@@ -30,10 +30,7 @@ export default {
 };
 ```
 
-## Options
-
-The plugin accepts an array of compressor configuration options, each of which can be either a string or an object. The string can be the name of a built-in compressor and its default configuration enabled.
-Or use the object format configuration and specify the compressor in the `use` field. The remaining fields of the object will be used as compressor configuration options.
+## Default Compressors
 
 By default, the plugin will enable `jpeg`, `png`, `ico` image compressors, which are equivalent to the following two examples:
 
@@ -45,19 +42,48 @@ pluginImageCompress(["jpeg", "png", "ico"]);
 pluginImageCompress([{ use: "jpeg" }, { use: "png" }, { use: "ico" }]);
 ```
 
+## Supported Compressors
+
+The plugin supports the following compressors:
+
+- `jpeg`: For JPEG images.
+- `png`: For PNG images.
+- `pngLossless`: For PNG images with lossless compression.
+- `ico`: For ICO images.
+- `svg`: For SVG images.
+- `avif`: For AVIF images.
+
+Only SVG are compressed by `svgo`, other compressors are compressed by `@napi-rs/image`.
+
+## Options
+
+The plugin accepts an array of compressor configuration options, each of which can be either a string or an object. The string can be the name of a built-in compressor and its default configuration enabled.
+
+Or use the object format configuration and specify the compressor in the `use` field. The remaining fields of the object will be used as compressor configuration options.
+
 The default configuration can be overridden by specifying a configuration option.
 For example, to allow the jpeg compressor to recognize new extension name and to set the quality of the png compressor.
 
 ```js
 pluginImageCompress([
+  // Options for @napi-rs/image `compressJpeg` method
   { use: "jpeg", test: /\.(?:jpg|jpeg|jpe)$/ },
+  // Options for @napi-rs/image `pngQuantize` method
   { use: "png", minQuality: 50 },
-  "ico",
+  // Options for @napi-rs/image `avif` method
+  { use: "avif", quality: 80 },
+  // Options for svgo
+  { use: 'svg', floatPrecision: 2 }
+  // No options yet
+  { use: "ico" },
 ]);
 ```
 
-The default `png` compressor is lossy.
-If you want to replace it with a lossless compressor, you can use the following configuration.
+For more information on compressors, please visit [@napi-rs/image](https://image.napi.rs/docs).
+
+## Lossless PNG
+
+The default `png` compressor is lossy. If you want to replace it with a lossless compressor, you can use the following configuration.
 
 ```js
 pluginImageCompress(["jpeg", "pngLossless", "ico"]);
@@ -71,8 +97,6 @@ For example, the `png` compressor will take precedence over the `pngLossless` co
 pluginImageCompress(["jpeg", "pngLossless", "ico", "png"]);
 ```
 
-For more information on compressors, please visit [@napi-rs/image](https://image.napi.rs/docs).
-
 ## License
 
 [MIT](./LICENSE).