Register a converted pack's colors for its own species

[BYGGOLDENSTONE]

Per our Discord chat — here's the colors half, on its own branch so you can review it on its own. (Physics is a separate PR; this one doesn't touch it.)

Symptom

Converting a non-human pack and then selecting that species in the Sidekick Character Creator shows only the Species color dropdown — Outfits / Attachments / Materials are missing, even though the Unity version of the same pack shows them. With some packs a scheme also lands in the wrong category (e.g. Sci-Fi Robots plating showing up under Elements). Human packs are unaffected.

Root cause

register_color_schemes.py files every pack's schemes under the Human species and only into the Outfits/Attachments groups:

OUTFIT_COLOR_GROUPS = (2, 3)
...
species = connection.execute("SELECT id FROM sk_species WHERE code='HN'").fetchone()

The toolkit's Presets tab gates a color category by the selected species (SSKPresetMenuWidget::ColourUIVisibility hides a group unless that species has ≥1 preset in it), so a non-human species ends up with nothing but its base Species entry.

Fix

Detect the pack's species from the part-name suffix (..._SN01 → Skeleton; the mesh suffix uses HU for the Human whose DB code is HN) and register accordingly:

• Species (skin / plating) colors → under the pack's own species.
• Outfits / Attachments → under Human (the shared pool).
• Only the groups an atlas actually fills (≥ 50% non-sentinel) are written.
• Materials / Elements are never written from an atlas. They're the base-curated sets (Materials 01–10, Elements 01); writing pack pixels into them is what mis-filed robot plating as an Element.

Then, to match the Unity tool (where the shared pools show for every species), each non-human species converted in the batch gets Human's Outfits / Attachments / Materials pools replicated onto it — keyed off the species being present, not off what its atlas fills, so a species that only ships skin colors (a zombie wearing human outfits) still gets the full menu. Elements stays Human-only. The replication is idempotent and leaves a species' own unique presets (e.g. Goblin's) untouched.

Compatibility

The manifest gains a third column (name\tcolormap.png\tspecies_code); a missing third column defaults to HN, so older manifests still work.

Tested

Starter (Human, regression-checked), Fantasy Skeletons, Sci-Fi Robots, Apocalypse Zombies — each species now shows the right categories, correctly filed; re-running is idempotent.