Create a CLI

If we want to make a new project derived from this template, the only way is to go to this repo and pressing the "Use this template" button. But this will add a new repo to our GitHub organization right away, and sometimes we don't want to do that, especially if we're building a prototype and don't know if the new project something we'll want to keep long-term.

It would be nice if we could run something like:

```
yarn create @metamask/module
```

This would act similar to `create-react-app`. That is, given the name of a project, it would:

- create a new directory locally
- initialize it as a Git repo
- replace all instances of "metamask-module-template" (in `package.json`, `README`, etc.) with the name of the project
- remove the "Examples" section from `.github/PULL_REQUEST_TEMPLATE`
- add an initial commit (called "Initial commit")

Start by reviewing the template files named in the issue, including package.json, README, and .github/PULL_REQUEST_TEMPLATE, then identify the project’s JavaScript CLI entry point. Done means a command accepting a project name creates a local directory, initializes Git, replaces the template name, removes the Examples section, and makes an Initial commit.

Written by the indexing model from the issue text.