adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/coordinated_attack.yaml

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+# Coordinated Attack - Wildstrider Beast Companion ability
+# Attack with pet
+
+ability_id: "coordinated_attack"
+name: "Coordinated Attack"
+description: "Attack in perfect coordination with your companion for bonus damage"
+ability_type: "skill"
+base_power: 30
+damage_type: "physical"
+scaling_stat: "wisdom"
+scaling_factor: 0.5
+mana_cost: 18
+cooldown: 2
+is_aoe: false
+target_count: 1
+effects_applied: []