Move History / Release Notes from gimp-help repository to GIMP History web page
Move https://gitlab.gnome.org/GNOME/gimp-help/-/tree/master/src/appendix/history* files to gimp-web:
- Expand GIMP 2.2 "What's new" release notes section
- Add GIMP 2.0 release notes
- Add latest stable releases to https://www.gimp.org/about/history.html based on data in https://gitlab.gnome.org/GNOME/gimp/-/blob/gimp-2-10/desktop/org.gimp.GIMP.appdata.xml.in.in
Edited by Andre Klapper