chore: Assets 디렉토리 구조 정리 및 네이밍 컨벤션 적용

- Assets/_Game/ 하위로 게임 에셋 통합
- External/ 패키지 벤더별 분류 (Synty, Animations, UI)
- 에셋 네이밍 컨벤션 확립 및 적용
  (Data_Skill_, Data_SkillEffect_, Prefab_, Anim_, Model_, BT_ 등)
- pre-commit hook으로 네이밍 컨벤션 자동 검사 추가
- RESTRUCTURE_CHECKLIST.md 작성

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Assets/External/Models/SidekickCharacters/Plugins/unity-sqlite-net-1.2.4/Tests/Editor.meta

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Assets/External/Models/SidekickCharacters/Plugins/unity-sqlite-net-1.2.4/Tests/Editor/Gilzoide.SqliteNet.Tests.Editor.asmdef

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+{
+    "name": "Gilzoide.SqliteNet.Tests.Editor",
+    "rootNamespace": "Gilzoide.SqliteNet.Tests.Editor",
+    "references": [
+        "UnityEngine.TestRunner",
+        "UnityEditor.TestRunner",
+        "Gilzoide.SqliteNet"
+    ],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": true,
+    "precompiledReferences": [
+        "nunit.framework.dll"
+    ],
+    "autoReferenced": false,
+    "defineConstraints": [
+        "UNITY_INCLUDE_TESTS"
+    ],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

Assets/External/Models/SidekickCharacters/Plugins/unity-sqlite-net-1.2.4/Tests/Editor/Gilzoide.SqliteNet.Tests.Editor.asmdef.meta

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Assets/External/Models/SidekickCharacters/Plugins/unity-sqlite-net-1.2.4/Tests/Editor/TestSerialization.cs

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+/*
+ * Copyright (c) 2024 Gil Barbosa Reis
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+using NUnit.Framework;
+using SQLite;
+
+namespace Gilzoide.SqliteNet.Tests.Editor
+{
+    public class TestSerialization
+    {
+        private class Row
+        {
+            [PrimaryKey]
+            public int Id { get; set; }
+            public int Value { get; set; }
+        }
+
+        [Test, TestCase(100)]
+        public void TestSQLiteSerialization(int quantity)
+        {
+            byte[] serializedDatabase;
+            using(var db = new SQLiteConnection(""))
+            {
+                db.CreateTable<Row>();
+                for (int i = 0; i < quantity; i++)
+                {
+                    int added = db.Insert(new Row
+                    {
+                        Id = i,
+                        Value = i,
+                    });
+                    Assert.That(added, Is.EqualTo(1));
+                }
+                serializedDatabase = db.Serialize();
+            }
+            Assert.That(serializedDatabase, Is.Not.Null);
+
+            using(var db = new SQLiteConnection(""))
+            {
+                db.Deserialize(serializedDatabase, flags: SQLite3.DeserializeFlags.ReadOnly);
+                for (int i = 0; i < quantity; i++)
+                {
+                    Row row = db.Table<Row>().Where(r => r.Id == i).FirstOrDefault();
+                    Assert.That(row, Is.Not.Null, $"Couldn't find row {i}");
+                    Assert.That(row.Id, Is.EqualTo(row.Value));
+                }
+            }
+        }
+    }
+}

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