misc: Create README.md

Author: YuKongA

README.md

@@ -0,0 +1,25 @@
+## MiuiX
+
+MiuiX is a shared UI component based on [Compose Multiplatform](https://www.jetbrains.com/compose-multiplatform/). 
+Currently supports Android / iOS / Desktop / WebAssembly / macOS.
+
+### Start
+
+```
+implementation("top.yukonga.miuix.kmp:miuix:<version>")
+```
+
+[![Maven Central](https://img.shields.io/maven-central/v/top.yukonga.miuix.kmp/miuix)](https://search.maven.org/search?q=g:top.yukonga.miuix.kmp)
+
+### Usage
+
+```
+@Composable
+fun App() {
+   MiuixTheme(
+        colorScheme = if (isSystemInDarkTheme()) darkColorScheme() else lightColorScheme()
+    ) {
+       // Other content...
+    }
+}
+```