adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/arcane_brilliance.yaml

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+# Arcane Brilliance - Lorekeeper Arcane Weaving ability
+# Intelligence buff
+
+ability_id: "arcane_brilliance"
+name: "Arcane Brilliance"
+description: "Grant an ally increased intelligence and magical power"
+ability_type: "spell"
+base_power: 0
+damage_type: null
+scaling_stat: "intelligence"
+scaling_factor: 0.4
+mana_cost: 10
+cooldown: 0
+is_aoe: false
+target_count: 1
+effects_applied:
+  - effect_id: "arcane_brilliance_buff"
+    name: "Arcane Brilliance"
+    effect_type: "buff"
+    duration: 5
+    power: 10
+    stat_affected: "intelligence"
+    stacks: 1
+    max_stacks: 1
+    source: "arcane_brilliance"