adding abilities, created skill tree template and unlock mechanics

api/app/data/abilities/lay_on_hands.yaml

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+# Lay on Hands - Oathkeeper Redemption ability
+# Touch heal
+
+ability_id: "lay_on_hands"
+name: "Lay on Hands"
+description: "Place your hands upon an ally to heal their wounds"
+ability_type: "spell"
+base_power: 25
+damage_type: "holy"
+scaling_stat: "wisdom"
+scaling_factor: 0.5
+mana_cost: 12
+cooldown: 0
+is_aoe: false
+target_count: 1
+effects_applied:
+  - effect_id: "gentle_healing"
+    name: "Soothed"
+    effect_type: "hot"
+    duration: 2
+    power: 5
+    stat_affected: null
+    stacks: 1
+    max_stacks: 1
+    source: "lay_on_hands"