Organize original artwork and ship original-derived HD sprites

[genixpro]

Part 2 of the #207 split. Organizes the recovered artist originals and existing Blender/GIMP/vector files, then ships 60 original-derived runtime frames with no AI. This PR targets the renderer/zoom branch so its diff contains artwork/export work only.

Includes 10 tree, 8 wheat, 5 papyrus, both hive states, 3 flags, 5 construction sprites, school, first two racetracks, and all 24 area markers. Other frames use classic artwork until the separate AI pack is applied. Logical dimensions, alpha and separate team-color layers are preserved.

Originals, concept art, reference exports, deterministic staging exports and approved original finals have distinct folders. Source/output hashes and native dimensions are recorded; 4× runtime canvases do not imply 4× native detail. 236 preserved source/reference/helper files are organized without modifying their original bytes.

Validation: all six original family validators and partial-pack dimension/layer/hash checks pass. The freshly built foundation engine passes gameplay/editor/replay integration and software checks with this original-only pack. No engine/test-code differences are introduced by this artwork PR. Partial resource coverage uses standalone HD textures; the complete atlases arrive with the next pack.

Walls, some resource families and building-state/finishing gaps remain documented. No historical AI experiments are included. Units remain with #201.

Review stack

1. Add high-resolution rendering support and shared map zoom #218 — engine support and zoom
2. Organize original artwork and ship original-derived HD sprites #219 — original sources and original-derived artwork (base: Add high-resolution rendering support and shared map zoom #218)
3. Add approved AI-enhanced artwork and staging pipeline #220 — AI-enhanced finals and candidate pipeline (base: Organize original artwork and ship original-derived HD sprites #219)

After a parent merges, retarget its child to master. #207 retains the prior discussion and is superseded by this stack.

Scope and build guide.

Final before/after gallery.