simplify code contributions by fully automating thesetup with Gitpod

[nisarhassan12]

Hi! :slightly_smiling_face:

This Pr simplifies code contributions by fully automating the dev setup with Gitpod(a free online VS Code like IDE) for contributing, with a single click it'll launch a workspace and automatically:

• clone the vue-toasted repo.
• install the dependencies.
• start the webserver.

So that anyone interested in contributing can start straight away.

You can give it a try on my fork of the repo via the following link:

https://gitpod.io/#https://github.com/nisarhassan12/vue-toasted

This is how it looks:

[shakee93]

Thank you !