添加Windows安装程序支持

- 创建Inno Setup安装脚本（VideoSubtitleRemover.iss）
- 添加中英文语言支持（ChineseSimplified.isl, English.isl）
- 创建安装程序编译脚本（build_installer.bat）
- 添加详细的编译说明文档
- 支持桌面快捷方式创建
- 支持开始菜单项添加
- 支持完整卸载程序
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

VideoSubtitleRemover.iss

@@ -0,0 +1,48 @@
+; 视频字幕去除器 - Inno Setup 安装程序脚本
+; 编译方法：下载 Inno Setup Compiler (https://jrsoftware.org/isdl.php)
+; 或者使用命令：iscc VideoSubtitleRemover.iss
+
+[Setup]
+AppName=视频字幕去除器
+AppVersion={#GetVersionNumber}
+AppPublisher=YaoFANGUK
+AppPublisherURL=https://github.com/YaoFANGUK/video-subtitle-remover
+AppSupportURL=https://github.com/YaoFANGUK/video-subtitle-remover/issues
+AppComments=基于AI的图片/视频硬字幕去除工具
+DefaultDirName={autopf}\Program Files\视频字幕去除器
+DefaultGroupName=视频字幕去除器
+AllowNoIcons=yes
+OutputBaseFilename=VideoSubtitleRemover-Setup
+Compression=lzma
+SolidCompression=yes
+; 内部文件需要更多内存，禁用
+InternalCompressLevel=none
+SetupIconFile=design\vsr.ico
+WizardImageFile=design\vsr.ico
+WizardSmallImageFile=design\vsr.ico
+WizardImageStretch=no
+UninstallDisplayIcon={app}\VideoSubtitleRemover.exe
+VersionInfoVersion=1.4.0
+VersionInfoCompany=YaoFANGUK
+VersionInfoDescription=视频字幕去除器
+VersionInfoCopyright=© 2026 YaoFANGUK
+VersionInfoProductName=视频字幕去除器
+
+[Languages]
+Name: "chinese"; MessagesFile: "compiler:Languages\ChineseSimplified.isl"
+Name: "english"; MessagesFile: "compiler:Languages\English.isl"
+
+[Files]
+Source: "dist\VideoSubtitleRemover\_internal\*"; DestDir: "{app}\_internal"; Flags: ignoreversion recursesubdirs createallsubdirs
+Source: "dist\VideoSubtitleRemover\VideoSubtitleRemover.exe"; DestDir: "{app}"; Flags: ignoreversion
+
+[Icons]
+Name: "{group}\视频字幕去除器"; Filename: "{app}\VideoSubtitleRemover.exe"
+Name: "{userdesktop}\视频字幕去除器"; Filename: "{app}\VideoSubtitleRemover.exe"
+Name: "{commonstartup}\视频字幕去除器"; Filename: "{app}\VideoSubtitleRemover.exe"
+
+[Run]
+Filename: "{app}\VideoSubtitleRemover.exe"; Description: "启动视频字幕去除器"; Flags: nowait postinstall skipifsilent
+
+[UninstallDelete]
+Type: filesandordirs; Name: "{app}"