chore: start transition layout — python into version-python/, scaffold version-rust/

- git mv of all existing files into version-python/ (history preserved)
- version-rust/: minimal cargo scaffold (edition 2024), no deps yet
- root AGENTS.md documents the transition rules and artifact/schema contract
- main is untouched; the python layout there stays as-is

version-python/data/library_catalog.json

@@ -0,0 +1,140 @@
+{
+  "comment": "Canonical library catalog. Fields: system/group/faction/subfaction/class/name/aliases. Names and aliases are matched case-insensitively; subfaction and class may be null. Aligned with miniset.net faction names.",
+  "entries": [
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": "Space Wolves",
+      "class": "Fast Attack",
+      "name": "Thunderwolf Cavalry",
+      "aliases": ["thunder wolf", "thunderwolves", "thunder wolf cavalry"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": "Space Wolves",
+      "class": "Elites",
+      "name": "Wulfen",
+      "aliases": ["wulfen dreadnought"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of Chaos",
+      "faction": "Chaos Daemons",
+      "subfaction": null,
+      "class": "HQ",
+      "name": "Keeper of Secrets",
+      "aliases": ["keeper of secrets and shalaxi helbane", "shalaxi helbane", "keepers of secrets"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "Drukhari",
+      "subfaction": null,
+      "class": null,
+      "name": "The Twin Lance",
+      "aliases": ["twin lance"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": null,
+      "class": "Elites",
+      "name": "Terminator Squad",
+      "aliases": ["terminators", "terminator squad"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": null,
+      "class": "Elites",
+      "name": "Dreadnought",
+      "aliases": ["dread"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": null,
+      "class": "HQ",
+      "name": "Captain",
+      "aliases": ["captain in gravis armour", "primaris captain"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": null,
+      "class": "Heavy Support",
+      "name": "Hellblaster Squad",
+      "aliases": ["hellblasters"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adeptus Astartes",
+      "subfaction": null,
+      "class": "Troops",
+      "name": "Intercessor Squad",
+      "aliases": ["intercessors"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "T'au Empire",
+      "subfaction": null,
+      "class": "HQ",
+      "name": "Commander Farsight",
+      "aliases": ["farsight"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "T'au Empire",
+      "subfaction": null,
+      "class": "HQ",
+      "name": "Commander Shadowsun",
+      "aliases": ["shadowsun"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "T'au Empire",
+      "subfaction": null,
+      "class": "Fast Attack",
+      "name": "Pathfinder Team",
+      "aliases": ["pathfinders"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "T'au Empire",
+      "subfaction": null,
+      "class": "Dedicated Transport",
+      "name": "Devilfish",
+      "aliases": ["devil fish"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Xenos Armies",
+      "faction": "T'au Empire",
+      "subfaction": null,
+      "class": null,
+      "name": "Assorted Drones",
+      "aliases": ["drones"]
+    },
+    {
+      "system": "Warhammer 40,000",
+      "group": "Armies of the Imperium",
+      "faction": "Adepta Sororitas",
+      "subfaction": null,
+      "class": null,
+      "name": "Battle Sisters",
+      "aliases": ["battle sister squad", "battle sisters squad"]
+    }
+  ]
+}