feat(units): ✨ Add Spearman and Wyvern Rider unit definitions with full stats, abilities, and visual references

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

public/games/age-of-dwarves/data/units/spearmen.json

@@ -0,0 +1,32 @@
+[
+  {
+    "id": "spearmen",
+    "name": "Spearmen",
+    "description": "Cheap defensive infantry. Reach lets them strike flying attackers.",
+    "gender": {
+      "male": { "name": "Spearmen", "sprite": "sprites/units/spearmen_m.png" },
+      "female": { "name": "Spearwomen", "sprite": "sprites/units/spearmen_f.png" }
+    },
+    "combat_type": "melee",
+    "school": null,
+    "domain": "land",
+    "armor_type": "medium",
+    "attack_type": "melee_physical",
+    "int": 4,
+    "dex": 8,
+    "str": 8,
+    "con": 8,
+    "cost": 20,
+    "range": 1,
+    "movement": 1,
+    "vision": 2,
+    "tech_required": "war",
+    "race_required": null,
+    "faction": null,
+    "keywords": ["reach"],
+    "resistances": {},
+    "merge": null,
+    "mana_cost": null,
+    "sprite": "sprites/units/spearmen.png"
+  }
+]

public/games/age-of-dwarves/data/units/wyvern_riders.json

@@ -0,0 +1,32 @@
+[
+  {
+    "id": "wyvern_riders",
+    "name": "Wyvern Riders",
+    "description": "Aerial warriors mounted on scaled wyverns. Fast and dangerous, bypass ground zones of control.",
+    "gender": {
+      "male": { "name": "Wyvern Riders", "sprite": "sprites/units/wyvern_riders_m.png" },
+      "female": { "name": "Wyvern Riders", "sprite": "sprites/units/wyvern_riders_f.png" }
+    },
+    "combat_type": "flying",
+    "school": null,
+    "domain": "air",
+    "armor_type": "natural",
+    "attack_type": "melee_physical",
+    "int": 4,
+    "dex": 12,
+    "str": 16,
+    "con": 12,
+    "cost": 70,
+    "range": 1,
+    "movement": 4,
+    "vision": 4,
+    "tech_required": "orc_heritage",
+    "race_required": "orcs",
+    "faction": null,
+    "keywords": [],
+    "resistances": {},
+    "merge": null,
+    "mana_cost": null,
+    "sprite": "sprites/units/wyvern_riders.png"
+  }
+]