feat(README): Add how to contribute

Author: fwangdo

README.md

@@ -150,3 +150,21 @@ const box = <Box _hover={{bg: ["red", "blue"]}}/>
 // Same
 const box = <Box _hover={[{bg: "red"}, {bg: "blue"}]}/>
 ```
+
+## How to Contribute
+
+### Requirements
+- Rust compiler installed
+- pnpm package manager installed
+
+### Development Setup
+To set up the development environment, install the following packages:
+```sh
+pnpm i
+pnpm build
+cargo install cargo-tarpaulin
+cargo install wasm-pack
+```
+After installation, run pnpm test to ensure everything works correctly.
+
+

README_ko.md

@@ -144,3 +144,19 @@ const box = <Box _hover={{bg: ["red", "blue"]}}/>
 // Same
 const box = <Box _hover={[{bg: "red"}, {bg: "blue"}]}/>
 ```
+
+## 기여 방법
+
+### 요구 사항
+- Rust 컴파일러 설치
+- pnpm 패키지 매니저 설치
+
+### 개발용 설치
+개발 환경을 위해 아래 패키지들을 설치합니다.
+```sh
+pnpm i
+pnpm build
+cargo install cargo-tarpaulin
+cargo install wasm-pack
+```
+설치 후 pnpm test를 실행하여 문제가 없는지 확인합니다.