Better gif/svg animation of starcli usage/demo

The latest usage gif was outdated and since then there were new features and bug fixes. We should provide a new, up-to-date when to show the full features.

**Requirements:**
* Shouldn’t be too slow, it is recommended that it is sped up, but users should see clearly what is happening
* No need to show all the features, but show as much as possible
* It should be run like a user who downloaded it as a package using `starcli ` not `python -m starcli`.
**To do so you have several options:**
1. clone this repo and do `python setup.py install`
2. Make a new directory in a virtual environment and use `pip install starcli` (or you favourite package manager)
3. Install starcli globally as a package like a normal user would
* Once you have your SVG (or gif) saved, put it in the images folder (replace the original gif), update the link in the README and push to remote to open a PR

**Some tools you could use:**
* [asciinema](https://asciinema.org) for terminal session recordings
* [How to speed up and Asciinema recording](https://stackoverflow.com/questions/57615791/speed-up-asciinema-by-editing-file)
* [Turn asciinema cast into clear, pretty SVGs](https://github.com/marionebl/svg-term-cli)

If you would like to work on this, there is no need to ask, just open a PR. If there are multiple, I will choose one that works best or even include all of them