feat(installer): add Inno Setup installer and fix Shell C++ DLL docx leakage

- Introduce Inno Setup standard EXE installer (Everything2Everything-Setup-x64.exe) for zero-friction end-user installation without certificate trust friction
- Fix hardcoded .docx recommendation in Everything2Everything.Shell dllmain.cpp
- Improve MSIX Install.cmd and Install.ps1 with robust privilege elevation and path parsing
- Integrate Inno Setup into tools/Publish-Release.ps1 pipeline and release upload
- Add automated regression tests for installer and packaging integrity

packaging/Everything2Everything.iss

@@ -0,0 +1,57 @@
+; Everything2Everything Inno Setup Script
+#ifndef MyAppVersion
+#define MyAppVersion "1.0.8"
+#endif
+
+#define MyAppName "Everything2Everything"
+#define MyAppPublisher "YunChan"
+#define MyAppURL "https://git.chanpaca.net/yunchan/Everything2Everything"
+#define MyAppExeName "Everything2Everything.exe"
+
+[Setup]
+AppId={{D3E4F5A6-B7C8-4901-2345-6789ABCDEF01}
+AppName={#MyAppName}
+AppVersion={#MyAppVersion}
+AppPublisher={#MyAppPublisher}
+AppPublisherURL={#MyAppURL}
+AppSupportURL={#MyAppURL}
+AppUpdatesURL={#MyAppURL}
+DefaultDirName={autopf}\{#MyAppName}
+UninstallDisplayIcon={app}\{#MyAppExeName}
+SetupIconFile=..\src\Everything2Everything.App\app.ico
+Compression=lzma2/ultra64
+SolidCompression=yes
+WizardStyle=modern
+ArchitecturesAllowed=x64compatible
+ArchitecturesInstallIn64BitMode=x64compatible
+DisableProgramGroupPage=yes
+OutputDir=dist
+OutputBaseFilename=Everything2Everything-{#MyAppVersion}-Setup-x64
+PrivilegesRequired=lowest
+PrivilegesRequiredOverridesAllowed=dialog commandline
+CloseApplications=yes
+RestartApplications=no
+
+[Languages]
+Name: "korean"; MessagesFile: "compiler:Languages\Korean.isl"
+Name: "english"; MessagesFile: "compiler:Default.isl"
+
+[Tasks]
+Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
+
+[Files]
+Source: "..\publish\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs
+
+[Icons]
+Name: "{autoprograms}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
+Name: "{autodesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon
+
+[Run]
+; 설치 완료 후 윈도우 우클릭 탐색기 메뉴 자동 등록
+Filename: "{app}\{#MyAppExeName}"; Parameters: "register"; Flags: runhidden
+; 앱 실행 (사일런트 설치가 아닐 때만)
+Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: nowait postinstall skipifsilent
+
+[UninstallRun]
+; 프로그램 삭제 전 윈도우 우클릭 탐색기 메뉴 자동 해제
+Filename: "{app}\{#MyAppExeName}"; Parameters: "unregister"; Flags: runhidden