docs: Update README and add development documentation

- Reformatted sections in README.md for better readability.
- Added new development documentation in docs/dev.md to guide setup and installation processes.
- Updated Japanese and Chinese README translations to reference the new development documentation.

docs/dev.md

@@ -0,0 +1,51 @@
+# 🖥️ Develop
+
+## IDE Setup
+
+[Cursor](https://www.cursor.com/) + [ESLint](https://marketplace.visualstudio.com/items?itemName=dbaeumer.vscode-eslint) + [Prettier](https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode)
+
+## Project Setup
+
+### Install
+
+```bash
+yarn
+```
+
+### Development
+
+### Setup Node.js
+
+Download and install [Node.js v20.x.x](https://nodejs.org/en/download)
+
+### Setup Yarn
+
+```bash
+corepack enable
+corepack prepare yarn@4.6.0 --activate
+```
+
+### Install Dependencies
+
+```bash
+yarn install
+```
+
+### Start
+
+```bash
+yarn dev
+```
+
+### Build
+
+```bash
+# For windows
+$ yarn build:win
+
+# For macOS
+$ yarn build:mac
+
+# For Linux
+$ yarn build:linux
+```