Update readme

Author: mori-atsushi

README.md

@@ -1,2 +1,54 @@
 ## InsetsX  [🚧 Work in progress 🚧]
-WindowInsets util for multiplatform
+[![](https://img.shields.io/badge/Kotlin-Multiplatform-%237f52ff?logo=kotlin)](https://kotlinlang.org/docs/multiplatform.html)
+[![](https://img.shields.io/maven-central/v/com.moriatsushi.insetsx/insetsx)](https://mvnrepository.com/artifact/com.moriatsushi.insetsx/insetsx)
+[![](https://img.shields.io/github/license/mori-atsushi/insetsx)](https://github.com/mori-atsushi/insetsx/blob/main/LISENCE)
+
+<img src="https://user-images.githubusercontent.com/13435109/236607484-22248c02-65de-4954-97a3-349907a2343e.png" width="720px"/>
+
+InsetsX provides a [WindowInsets](https://developer.android.com/reference/kotlin/androidx/compose/foundation/layout/WindowInsets) utility for [Compose Multiplatform](https://www.jetbrains.com/lp/compose-multiplatform/).
+
+It aim to work with WindowInsets with the same interface on iOS and Android.
+
+This library will be archived when the official library can handle WindowInsets.
+
+## Setup
+Add the dependency as follows:
+
+```kotlin
+kotlin {
+    /* ... */
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation("com.moriatsushi.insetsx:insetsx:0.1.0-alpha01")
+            }
+        }
+    }
+}
+```
+
+## How to use
+This works much like Android's WindowInsets.
+Please note that the package name is different.
+
+```kotlin
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.layout.WindowInsets
+import com.moriatsushi.insetsx.systemBars
+
+val modifier = Modifier
+    .windowInsetsPadding(WindowInsets.systemBars)
+```
+
+## APIs
+
+API|android|ios
+:--|:--|:--
+WindowInsets.systemBars|status bar + navigation bar|SafeArea
+WindowInsets.navigationBars|navigation bar|bottom of SafeArea
+WindowInsets.statusBars|status bar|top and horizontal of SafeArea
+WindowInsets.ime *1|software keyboard|software keyboard
+WindowInsets.safeDrawing *1|system bars + software keyboard|SafeArea + software keyboard
+
+*1 is experimental