This patch adds simulation/templates/skirmish/structures/default_*.xml files for the range, stable, workshop, and wonder templates, because these exist for all factions and could thus be used in maps.
Default skirmish placeholders for the elephant stable aren't added, because not all civilizations have one; for comparison, other structures shared by some but not all (e.g. library, rotary mill, theatre) don't have them either.
[EDIT]: also corrected workshop templates encountered when looking for largest footprint:
- all workshops have the same footprint; brit was the exception, but if anything, its actor looks slightly smaller than the others in Atlas, therefore there is no need to assign it a slightly larger footprint in its template
- removed foundation and rubble from specific templates, because it's already appropiately defined in the shared generic parent template
- no need to give kush workshop a different queue, because technologies already have "civ": or "notciv": requirements
- correct Greek specific name, per https://wildfiregames.com/forum/index.php?/topic/25268-specific-name-review-structures/page/3/&tab=comments#comment-378978
(should probably have been done in a separate patch)