adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/holy_fire.yaml

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+# Holy Fire - Luminary Radiant Judgment ability
+# Holy DoT with reduced healing
+
+ability_id: "holy_fire"
+name: "Holy Fire"
+description: "Engulf your enemy in holy flames that burn over time and reduce their healing"
+ability_type: "spell"
+base_power: 25
+damage_type: "holy"
+scaling_stat: "wisdom"
+scaling_factor: 0.5
+mana_cost: 18
+cooldown: 2
+is_aoe: false
+target_count: 1
+effects_applied:
+  - effect_id: "holy_burning"
+    name: "Holy Fire"
+    effect_type: "dot"
+    duration: 3
+    power: 8
+    stat_affected: null
+    stacks: 1
+    max_stacks: 1
+    source: "holy_fire"