chore: Add README.md

Author: SimYunSup

README.md

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+# DotnetDevKR.TailwindCSS
+
+[![NuGet Version](https://img.shields.io/nuget/v/DotnetDevKR.TailwindCSS.svg)](https://www.nuget.org/packages/DotnetDevKR.TailwindCSS/)
+[![License: MPL 2.0](https://img.shields.io/badge/License-MPL%202.0-brightgreen.svg)](https://opensource.org/licenses/MPL-2.0)
+
+A .NET MSBuild integration package for TailwindCSS that automatically compiles your TailwindCSS files during the build process. This package includes cross-platform TailwindCSS standalone executables and provides seamless integration with .NET projects.
+
+## Features
+
+- 🚀 **Automatic compilation** during MSBuild process
+- 📦 **No Node.js dependency** - uses standalone TailwindCSS CLI
+- 🔧 **MSBuild integration** with customizable properties
+
+## Installation
+
+Install the NuGet package in your .NET project:
+
+```bash
+dotnet add package DotnetDevKR.TailwindCSS
+```
+
+## Quick Start
+
+> [!Warning]
+> Rebuilding when `dotnet watch` is not working, so If you use `dotnet watch`, hit `Ctrl` + `R`
+
+1. **Install the package** in your project
+2. **Create a TailwindCSS input file** (e.g., `tailwind.css`):
+   ```css
+   @import "tailwindcss";
+   ```
+3. **Configure MSBuild properties** in your `.csproj` file:
+   ```xml
+   <Target Name="Configure" BeforeTargets="RunTailwindCSSTask">
+     <PropertyGroup>
+       <InputFilename>$(ProjectDir)tailwind.css</InputFilename>
+       <OutputFilename>wwwroot\css\app.css</OutputFilename>
+       <IsMinify>false</IsMinify>
+       <DebugMode>true</DebugMode>
+     </PropertyGroup>
+   </Target>
+   ```
+4. **Build your project** - TailwindCSS will be compiled automatically!
+
+## Configuration
+
+Configure the TailwindCSS compilation by setting these properties in your project file:
+
+| Property         | Description                               | Default           | Required |
+| ---------------- | ----------------------------------------- | ----------------- | -------- |
+| `InputFilename`  | Path to the input TailwindCSS file        | -                 | No       |
+| `OutputFilename` | Path where the compiled CSS will be saved | -                 | ✅ Yes   |
+| `IsMinify`       | Enable CSS minification                   | `false`           | No       |
+| `DebugMode`      | Generate source maps                      | `false`           | No       |
+| `ProjectDir`     | Project directory for TailwindCSS context | Current directory | No       |
+
+### Example Configuration
+
+```xml
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DotnetDevKR.TailwindCSS" Version="0.0.1" />
+  </ItemGroup>
+
+  <Target Name="Configure" BeforeTargets="RunTailwindCSSTask">
+    <PropertyGroup>
+      <InputFilename>$(ProjectDir)tailwind.css</InputFilename>
+      <OutputFilename>wwwroot\css\app.css</OutputFilename>
+      <IsMinify Condition="'$(Configuration)' == 'Release'">true</IsMinify>
+      <DebugMode Condition="'$(Configuration)' == 'Debug'">true</DebugMode>
+    </PropertyGroup>
+  </Target>
+
+</Project>
+```
+
+## Development Workflow
+
+### For Development
+
+- Set `DebugMode="true"` to generate source maps
+- Set `IsMinify="false"` for readable CSS output
+
+### For Production
+
+- Set `IsMinify="true"` to reduce file size
+- Set `DebugMode="false"` to disable source maps
+
+## Example Projects
+
+Check out the `DotnetDevKR.TailwindCSS.WebTest` folder for a complete Blazor WebAssembly example that demonstrates:
+
+- Basic TailwindCSS integration
+- MSBuild configuration
+- File structure organization
+
+## How It Works
+
+1. **MSBuild Integration**: The package registers a build task that runs before the main build
+2. **Platform Detection**: Automatically detects your OS and architecture
+3. **TailwindCSS Execution**: Runs the appropriate TailwindCSS standalone executable
+4. **File Processing**: Compiles your input CSS file and outputs the result
+
+## Requirements
+
+- .NET 6.0 or higher
+- Any platform supported by .NET (Windows, macOS, Linux)
+
+## Contributing
+
+Contributions are welcome! Please feel free to submit a Pull Request.
+
+## License
+
+This project is licensed under the Mozilla Public License 2.0 - see the [LICENSE.md](LICENSE.md) file for details.
+
+## Acknowledgments
+
+- [TailwindCSS](https://tailwindcss.com/) for the amazing CSS framework (MIT LICENSE)
+- [TailwindCSS CLI](https://github.com/tailwindlabs/tailwindcss) for the standalone executable
+- [AspNetCore.SassCompiler](https://github.com/koenvzeijl/AspNetCore.SassCompiler) – inspiration for CSS compilation and tooling integration
+
+---
+
+Made with ❤️ by [DotnetDevKR](https://github.com/dotnetdev-kr) and [Forum](https://forum.dotnetdev.kr)