README: add more information and badges

Make more appealing the introductory README. Further badges to
improve the appearance of the first page are added, also to provide 
further insights and information to new users.

.github/workflows/ci.yml

@@ -75,6 +75,6 @@ jobs:
             uses: codecov/codecov-action@v3
             with:
                 token: ${{ secrets.CODECOV_TOKEN }}
-                name: pytests-lammps
+                name: pytests-vibroscopy3.9
                 flags: pytests
                 fail_ci_if_error: true

README.md

@@ -1,12 +1,18 @@
 # aiida-vibroscopy
-[![PyPI version](https://badge.fury.io/py/aiida-vibroscopy.svg)](https://badge.fury.io/py/aiida-vibroscopy)
-[![PyPI pyversions](https://img.shields.io/pypi/pyversions/aiida-vibroscopy.svg)](https://pypi.python.org/pypi/aiida-vibroscopy)
-[![Build Status](https://github.com/bastonero/aiida-vibroscopy/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/bastonero/aiida-vibroscopy/actions)
-[![Docs status](https://readthedocs.org/projects/aiida-vibroscopy/badge)](http://aiida-vibroscopy.readthedocs.io/)
 
 AiiDA plugin that uses finite displacements and fields
-to compute phonon properties, dielectric and
-Born effective charges tensors, Infrared and Raman spectra.
+to compute phonon properties, dielectric, Born effective charges,
+ Raman and non-linear optical susceptibility tensors,
+coming with lots of post-processing tools to compute infrared and
+Raman spectra in different settings.
+
+|    | |
+|-----|----------------------------------------------------------------------------|
+|Latest release| [![PyPI version](https://badge.fury.io/py/aiida-vibroscopy.svg)](https://badge.fury.io/py/aiida-vibroscopy)[![PyPI pyversions](https://img.shields.io/pypi/pyversions/aiida-vibroscopy.svg)](https://pypi.python.org/pypi/aiida-vibroscopy) |
+|Getting help| [![Docs status](https://readthedocs.org/projects/aiida-vibroscopy/badge)](http://aiida-vibroscopy.readthedocs.io/) [![Discourse status](https://img.shields.io/discourse/status?server=https%3A%2F%2Faiida.discourse.group%2F)](https://aiida.discourse.group/)
+|Build status| [![Build Status](https://github.com/bastonero/aiida-vibroscopy/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/bastonero/aiida-vibroscopy/actions) [![Coverage Status](https://codecov.io/gh/bastonero/aiida-vibroscopy/branch/main/graph/badge.svg)](https://codecov.io/gh/bastonero/aiida-vibroscopy) |
+|Activity| [![PyPI-downloads](https://img.shields.io/pypi/dm/aiida-vibroscopy.svg?style=flat)](https://pypistats.org/packages/aiida-vibroscopy) [![Commit Activity](https://img.shields.io/github/commit-activity/m/bastonero/aiida-vibroscopy.svg)](https://github.com/bastonero/aiida-vibroscopy/pulse)
+|Community|  [![Discourse](https://img.shields.io/discourse/topics?server=https%3A%2F%2Faiida.discourse.group%2F&logo=discourse)](https://aiida.discourse.group/)
 
 ## Installation
 To install from PyPI, simply execute: