GitLab

* New compara and variation stats;

* Add sample regulation stats for human and mouse

Populate the species homepage sidebar by using sample data defined locally.

- Created the ExpandableSection shared component
- Created the species page accordion
- Created the sample-data and the transformation function to populate the species homepage accordion including the example links
Co-authored-by: Andrey Azov <andrey@ebi.ac.uk>

* Test data for first draft of species page accordion - ENSWEBREL-744

* Revert "Test data for first draft of species page accordion - ENSWEBREL-744"

This reverts commit b4f0c8b9.

* Test data for first draft of species page accordion - ENSWEBREL-744

Add licence header to all typescript files in the src and stories directories

Also:
- change the black colour across the site, and add soft-black colour
- update the Checkbox component to change cursor appearance to pointer
  when mousing over label, and to catalogue classNames props
  that can be passed to the Checkbox.
- update the Button component so that the active state of the PrimaryButton and
   SecondaryButton have a 1px-wide border (to avoid changes in button size
   when toggling between disabled and enabled states of the button)
- add option to prettier config to remove trailing commas from objects