Proposal: Rename `init` to `new`.

[deuszx]

I propose renaming init command to new. There are two reasons for this that come to my mind:

1. Similarity with cargo contract -- it uses new for generating starting package/template for the project.
2. Sometimes, users may already have a working smart contract that they wish to deploy using swanky-cli. It's currently impossible to "just" init a project - i.e. generate swanky config file. This would match the functionality of git init as well.

I can do the work, just wanted to ask for your opinions first.

[codespool]

I agree. Another reason is we also have swanky contract new command, so this would be more consistent. Please proceed with the PR 👍