Provide Microsoft.AspNetCore.Components.WebAssembly.DevServer package README (dotnet#57805)

Author: MackinnonBuck

src/Components/WebAssembly/DevServer/src/PACKAGE.md

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+## About
+
+`Microsoft.AspNetCore.Components.WebAssembly.DevServer` provides a development server for use when building Blazor WebAssembly standalone applications.
+
+## How to use
+
+To use `Microsoft.AspNetCore.Components.WebAssembly.DevServer`, add the package to your project:
+
+```shell
+dotnet add package Microsoft.AspNetCore.Components.WebAssembly.DevServer
+```
+
+Make sure that the newly-added `<PackageReference />` in the `.csproj` file includes `PrivateAssets="all"`:
+
+```xml
+<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="..." PrivateAssets="all" />
+```
+
+## Additional Documentation
+
+For additional documentation and examples, refer to the [official documentation](https://learn.microsoft.com/en-us/aspnet/core/blazor/debug#packages) on debugging Blazor WebAssembly applications.
+
+## Feedback &amp; Contributing
+
+`Microsoft.AspNetCore.Components.WebAssembly.DevServer` is released as open-source under the [MIT license](https://licenses.nuget.org/MIT). Bug reports and contributions are welcome at [the GitHub repository](https://github.com/dotnet/aspnetcore).