Allow creating new projects from pre-defined templates

[ranile]

Describe the problem you are trying to solve

Getting started with Rust frameworks is a cumbersome task. Especially the frameworks which require boilerplate to be used. WASM web frameworks is one example of such frameworks. The user is forced to choose between two options:

1. Create the boilerplate manually - either copy/paste it from documentation or write it out by hand
2. Use a tool like cargo-generate

Describe the solution you'd like

• A new command such as cargo init <template>
• Add this functionality to cargo new --template

PS: I'd be happy to clarify anything in case I missed some information

[ehuss]

Thanks for the request! I'm going to close this as a duplicate of #5151. Adding template support will require an RFC (such as rust-lang/rfcs#2922).