adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/mass_heal.yaml

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+# Mass Heal - Luminary Divine Protection ability
+# AoE healing
+
+ability_id: "mass_heal"
+name: "Mass Heal"
+description: "Channel divine energy to heal all allies"
+ability_type: "spell"
+base_power: 35
+damage_type: "holy"
+scaling_stat: "wisdom"
+scaling_factor: 0.55
+mana_cost: 30
+cooldown: 3
+is_aoe: true
+target_count: 0
+effects_applied:
+  - effect_id: "mass_regen"
+    name: "Divine Healing"
+    effect_type: "hot"
+    duration: 2
+    power: 8
+    stat_affected: null
+    stacks: 1
+    max_stacks: 1
+    source: "mass_heal"