feat: 채널링 빔 스킬 시스템 구현 및 PolygonParticleFX VFX 에셋 추가

- SkillData: 채널링 필드 추가 (지속시간, 틱 간격, 틱/종료 효과, VFX 프리팹, 마운트 경로, 크기 배율)
- SkillController: 채널링 상태 관리 (Start/Update/End), VFX 생성/파괴, 틱 효과 주기 발동, 버튼 해제로 중단
- SkillEffect: Beam(원통) 범위 판정 추가 (OverlapCapsule), 디버그 시각화
- PlayerSkillInput: 스킬 취소(canceled) 이벤트 구독 → 채널링 중단 통지
- SkillLoadoutEntry: 채널링 틱/종료 효과 수집 메서드 추가
- 스킬 데이터/이펙트/애니메이션/VFX 에셋 추가 (채널링 스킬용)
- PolygonParticleFX VFX 에셋 패키지 추가 (Materials, Models, Prefabs, Textures, Scenes)

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Player_광선_0_데미지.asset

@@ -12,17 +12,17 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 58efb3c775496fa40b801b21127a011e, type: 3}
   m_Name: "Data_SkillEffect_Player_\uAD11\uC120_0_\uB370\uBBF8\uC9C0"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.DamageEffect
-  targetType: 0
+  targetType: 1
   targetTeam: 0
   areaCenter: 0
-  areaShape: 0
+  areaShape: 2
   targetLayers:
     serializedVersion: 2
-    m_Bits: 0
+    m_Bits: 64
   includeCasterInArea: 0
-  areaRadius: 3
+  areaRadius: 15
   fanOriginDistance: 1
-  fanRadius: 3
+  fanRadius: 1
   fanHalfAngle: 45
   baseDamage: 5
   damageType: 1

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Player_마법_마법발사_1_스폰.asset

@@ -10,7 +10,7 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: a3139ddf07cfe324fa692a88cd565e24, type: 3}
-  m_Name: "Data_SkillEffect_Player_\uD55C\uC190_\uB9C8\uBC95\uBC1C\uC0AC_1_\uC2A4\uD3F0"
+  m_Name: "Data_SkillEffect_Player_\uB9C8\uBC95_\uB9C8\uBC95\uBC1C\uC0AC_1_\uC2A4\uD3F0"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.SpawnEffect
   targetType: 0
   targetTeam: 0

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Player_마법_마법오름_0_데미지.asset

@@ -10,7 +10,7 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: 58efb3c775496fa40b801b21127a011e, type: 3}
-  m_Name: "Data_SkillEffect_Player_\uD55C\uC190_\uB9C8\uBC95\uC624\uB984_0_\uB370\uBBF8\uC9C0"
+  m_Name: "Data_SkillEffect_Player_\uB9C8\uBC95_\uB9C8\uBC95\uC624\uB984_0_\uB370\uBBF8\uC9C0"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.DamageEffect
   targetType: 1
   targetTeam: 0

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Player_마법_마법오름_1_VFX.asset

@@ -10,7 +10,7 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: 69581e050479a094782d2ca9eb142fe4, type: 3}
-  m_Name: "Data_SkillEffect_Player_\uD55C\uC190_\uB9C8\uBC95\uC624\uB984_1_VFX"
+  m_Name: "Data_SkillEffect_Player_\uB9C8\uBC95_\uB9C8\uBC95\uC624\uB984_1_VFX"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.VfxEffect
   targetType: 0
   targetTeam: 0

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Player_마법_마법휘두르기_0_데미지.asset

@@ -10,7 +10,7 @@ MonoBehaviour:
   m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: 58efb3c775496fa40b801b21127a011e, type: 3}
-  m_Name: "Data_SkillEffect_Player_\uD55C\uC190_\uB9C8\uBC95\uD718\uB450\uB974\uAE30_0_\uB370\uBBF8\uC9C0"
+  m_Name: "Data_SkillEffect_Player_\uB9C8\uBC95_\uB9C8\uBC95\uD718\uB450\uB974\uAE30_0_\uB370\uBBF8\uC9C0"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.DamageEffect
   targetType: 1
   targetTeam: 0