adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/mesmerize.yaml

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+# Mesmerize - Lorekeeper Illusionist ability
+# Stun for 2 turns
+
+ability_id: "mesmerize"
+name: "Mesmerize"
+description: "Mesmerize your target with illusions, stunning them for 2 turns"
+ability_type: "spell"
+base_power: 0
+damage_type: "arcane"
+scaling_stat: "charisma"
+scaling_factor: 0.5
+mana_cost: 22
+cooldown: 4
+is_aoe: false
+target_count: 1
+effects_applied:
+  - effect_id: "mesmerized"
+    name: "Mesmerized"
+    effect_type: "stun"
+    duration: 2
+    power: 0
+    stat_affected: null
+    stacks: 1
+    max_stacks: 1
+    source: "mesmerize"