I've shipped modesetting-based images and mga2-based ones
(and reverted to modesetting by hand "when it MUST work");
let's just do it right.

NB: found out that Name fields must NOT contain ";"
    or alterator-apt chokes in runtime (not fatal
    but still spectacular, see #35526).

These describe what's needed to set up a single-seat (as usual,
now just default) or dual-seat (out-of-box, given a checkbox)
Elbrus 801-PC.

Huge thanks to bircoph@ for actually implementing this!

There was no thunderbird built for e2k for a while,
and some images might benefit from a lightweight
GUI MUA; the only question is whether it belongs
to workstation classification or not really.

These have been asked for by dd@, let's provide a checkbox.

'twas copypasted from agents and a real-life interrupt
has chimed in for me to fail updating the file contents
as intended :-/

The funny thing is that it never made it to Workstation 8.1...

...that replace the actual group contents while
trying to preview that during installation.

agents: suggested by myself, widely approved;
cloud-clients: suggested by peers (aen@?);
voip-clients: suggested by Erik.

These deliver *-preinstall packages (thanks cas@).
Yes, a local sysadmin still needs to actually get
those wares (if they do) but it's less pain when
the libraries needed are in place.

These filenames became a bit too specific when
connector got added there too (thanks ekorneechev@
for both creating it and packaging for ALT).

This is to get rid of a "useful" component in default installation
but to keep it available for those who might need it for some reason
(like regulatory one).

These mostly come from m-p-d but have been heavily reworked
for the new workstation distro, here's a list of the
typical changes:

- changed X-Alterator-Parent from centaurus-desktop
  to a more fine-grained toplevel entry;
- tweaked Categories for the desktop file (e.g. pidgin);
- packages added or removed (like sane to scanning);
- adapted for m-p's biarch support scheme (see emulators);
- renamed more appropriately (for example, 3d -> blender);
- improved descriptions (e.g. by adding specific product
  names to groups referencing single-package lists).

Several ones were done from scratch.

NB: lists/groups have been moved into workstation/
    and intersynced accordingly.