docs: update readme

Author: sonofmagic

README.md

@@ -4,6 +4,7 @@ A util for mangle tailwindcss
 
 - [tailwindcss-mangle](#tailwindcss-mangle)
   - [tailwindcss-patch](#tailwindcss-patch)
+  - [tailwindcss-mangle-core](#tailwindcss-mangle-core)
   - [unplugin-tailwindcss-mangle](#unplugin-tailwindcss-mangle)
 
 ## tailwindcss-patch
@@ -12,6 +13,12 @@ A util for mangle tailwindcss
 
 click [tailwindcss-patch](./packages/tailwindcss-patch) for more details.
 
+## tailwindcss-mangle-core
+
+The core of tailwindcss-mangle
+
+click [tailwindcss-mangle-core](./packages/tailwindcss-mangle-core) for more details.
+
 ## unplugin-tailwindcss-mangle
 
 `unplugin-tailwindcss-mangle` is a plugin for `webpack` and `vite` to **obfuscate** tailwindcss class.