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

data/library_catalog.json

@@ -1,140 +0,0 @@
-{
-  "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"]
-    }
-  ]
-}