spells: flatten frontmatter (range/targets/castingTime/overcast as plain values), add damageBase

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

spells/sacred/artemis/bridge.md

@@ -8,45 +8,16 @@ school: sacred
 deity: artemis
 sourceBook: ksiega-magii
 manaCost: 4
-bloodCost: 0
-complexityLevel: 0
-isSuperspell: false
-requiresGroupCast: false
-minCasters: 1
-nonCombatOnly: false
-damageBase: ''
-damageType: ''
-ignoresArmor: false
-statusEffects: []
-saveAttribute: ''
-saveSkill: ''
-triggers: []
-components:
-  verbal: false
-  somatic: false
-  material: ''
-  symbols: []
-requirements:
-  race: []
-  talent: []
-  discipline:
-    - sacred
-difficulty:
-  threshold: 6
-  successes: 1
-range:
-  kind: self
+threshold: 6
+successes: 1
+requiresDiscipline:
+  - sacred
+castingTime: Instant
+range: Self
+targets: Na siebie
 duration: 2 rundy
-castingTime: ''
-target: Na siebie
-areaOfEffect: null
-overcastOptions:
-  - text: +1 runda trwania
-    repeatable: true
-    cost: 0
-description: >-
-  Wybrana część ciała zamienia się w zwierzęcy odpowiednik. Wraz z Mistrzem Gry
-  należy ustalić efekt, który ta zmiana daje.
+overcast:
+  - +1 runda trwania
 ---
 # Pomost