adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/bestial_wrath.yaml

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+# Bestial Wrath - Wildstrider Beast Companion ability
+# Pet damage buff
+
+ability_id: "bestial_wrath"
+name: "Bestial Wrath"
+description: "Enrage your companion, increasing their damage for 3 turns"
+ability_type: "skill"
+base_power: 0
+damage_type: null
+scaling_stat: "wisdom"
+scaling_factor: 0.4
+mana_cost: 25
+cooldown: 4
+is_aoe: false
+target_count: 1
+effects_applied:
+  - effect_id: "enraged_companion"
+    name: "Enraged Companion"
+    effect_type: "buff"
+    duration: 3
+    power: 50
+    stat_affected: null
+    stacks: 1
+    max_stacks: 1
+    source: "bestial_wrath"