Refactor and clean up game assets and editor modules

- Deleted unused weapon and enemy stat assets to streamline project.
- Updated player form assets to reference new default weapon IDs.
- Enhanced DataHub editor UI for better usability, including improved tab management and detail views.
- Removed icon references in various editor modules to simplify the interface.
- Added new boss skill assets and corresponding metadata for future development.
- Created new folders and metadata for organizing boss-related assets, skills, and stats.
- Implemented a new skill asset with updated properties for better gameplay mechanics.

Assets/_Game/Data/Player/Forms/PLY_Form_DiHun.asset

@@ -15,5 +15,5 @@ MonoBehaviour:
   formId: DiHun
   displayName: "\u5730\u9B42"
   formType: 1
-  defaultWeapon: {fileID: 0}
+  defaultWeapon: {fileID: 11400000, guid: bde7d85bdf2d3e54da22d07b1f8d2901, type: 2}
   formAccentColor: {r: 1, g: 1, b: 1, a: 1}

Assets/_Game/Data/Player/Forms/PLY_Form_MingHun.asset

@@ -15,5 +15,5 @@ MonoBehaviour:
   formId: MingHun
   displayName: "\u547D\u9B42"
   formType: 2
-  defaultWeapon: {fileID: 0}
+  defaultWeapon: {fileID: 11400000, guid: fbe1ff6f23c995541a5833b51c52dc01, type: 2}
   formAccentColor: {r: 1, g: 1, b: 1, a: 1}

Assets/_Game/Data/Player/Forms/PLY_Form_TianHun.asset

@@ -15,5 +15,5 @@ MonoBehaviour:
   formId: TianHun
   displayName: "\u5929\u9B42"
   formType: 0
-  defaultWeapon: {fileID: 0}
+  defaultWeapon: {fileID: 11400000, guid: 533d4711e21d8584597a5d4569fe2eb0, type: 2}
   formAccentColor: {r: 1, g: 1, b: 1, a: 1}