adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/divine_intervention.yaml

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+# Divine Intervention - Luminary Divine Protection ability
+# Full heal + cleanse
+
+ability_id: "divine_intervention"
+name: "Divine Intervention"
+description: "Call upon divine power to fully heal and cleanse an ally of all negative effects"
+ability_type: "spell"
+base_power: 80
+damage_type: "holy"
+scaling_stat: "wisdom"
+scaling_factor: 0.6
+mana_cost: 45
+cooldown: 5
+is_aoe: false
+target_count: 1
+effects_applied: []