feat: 新增一键构建脚本 (v2.0.1)

- 添加 build.ps1 PowerShell 构建脚本
- 添加 build.bat 批处理入口（双击一键构建）
- 支持 Debug/Release 配置切换
- 支持自包含模式发布
- 自动检测 .NET SDK、清理输出、编译打包

Output/Installer/net6.0-windows/Better-Seewo.Installer.deps.json

@@ -0,0 +1,41 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v6.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v6.0": {
+      "Better-Seewo.Installer/2.0.0": {
+        "dependencies": {
+          "Newtonsoft.Json": "13.0.3"
+        },
+        "runtime": {
+          "Better-Seewo.Installer.dll": {}
+        }
+      },
+      "Newtonsoft.Json/13.0.3": {
+        "runtime": {
+          "lib/net6.0/Newtonsoft.Json.dll": {
+            "assemblyVersion": "13.0.0.0",
+            "fileVersion": "13.0.3.27908"
+          }
+        }
+      }
+    }
+  },
+  "libraries": {
+    "Better-Seewo.Installer/2.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    },
+    "Newtonsoft.Json/13.0.3": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-HrC5BXdl00IP9zeV+0Z848QWPAoCr9P3bDEZguI+gkLcBKAOxix/tLEAAHC+UvDNPv4a2d18lOReHMOagPa+zQ==",
+      "path": "newtonsoft.json/13.0.3",
+      "hashPath": "newtonsoft.json.13.0.3.nupkg.sha512"
+    }
+  }
+}

Output/Installer/net6.0-windows/Better-Seewo.Installer.runtimeconfig.json

@@ -0,0 +1,18 @@
+{
+  "runtimeOptions": {
+    "tfm": "net6.0",
+    "frameworks": [
+      {
+        "name": "Microsoft.NETCore.App",
+        "version": "6.0.0"
+      },
+      {
+        "name": "Microsoft.WindowsDesktop.App",
+        "version": "6.0.0"
+      }
+    ],
+    "configProperties": {
+      "System.Reflection.Metadata.MetadataUpdater.IsSupported": false
+    }
+  }
+}