Add to Scoop Package Manager

## Problem

As a user, it is inconvenient to install, update, and use bundletool on Windows.
A package manager installation option would greatly help this.

## Solution

I'd like bundletool to be added to the [Scoop](https://scoop.sh/) package manager.

There's an excellent example of prior art in [google-java-format](https://github.com/google/google-java-format). It's also just a jar file that comes from Google. You can find it on the [Scoop - Apps](https://scoop.sh/#/apps?q=google-java-format) page. The [google-java-format.json](https://github.com/ScoopInstaller/Extras/blob/master/bucket/google-java-format.json) file itself is very straightforward, and there's a guide on the Scoop homepage on the simple process of creating a package.

## Alternatives

I note that Homebrew is already supported for Mac.
I investigated Chocolatey, but it's got issues that make it less developer friendly.
I noticed that there's a previous feature request for WinGet support. My experiences with WinGet have been mixed at best.