Add wasm project template

[jsturtevant]

We can automate the process of modifying these values in a new csproj: https://github.com/bytecodealliance/componentize-dotnet?tab=readme-ov-file#3-configure-the-compilation-output

by providing a template https://learn.microsoft.com/en-us/dotnet/core/tools/custom-templates that can be installed and create with dotnet new install nuget<TEMPLATE> and dotnet new <TEMPLATE>