feat: update SDK and GUI versions, add debugger protection settings

- Updated SDK_DECODER_SEMVER to "1.3.0" and GUI_SEMVER to "1.2.4" in config.ini.
- Updated MailViewer component to handle PDF already open error and improved iframe handling.
- Removed deprecated useMsgConverter setting from settings page.
- Added IsDebuggerRunning function to check for attached debuggers and quit the app if detected.
- Enhanced PDF viewer to prevent infinite loading and improved error handling.

Co-Authored-By: Laky-64 <iraci.matteo@gmail.com>

app.go

@@ -101,12 +101,12 @@ func (a *App) ReadMSG(filePath string, useExternalConverter bool) (*internal.Ema
 	if useExternalConverter {
 		return internal.ReadMsgFile(filePath)
 	}
-	return internal.OSSReadMsgFile(filePath)
+	return internal.ReadMsgFile(filePath)
 }
 
 // ReadMSGOSS reads a .msg file and returns the email data
 func (a *App) ReadMSGOSS(filePath string) (*internal.EmailData, error) {
-	return internal.OSSReadMsgFile(filePath)
+	return internal.ReadMsgFile(filePath)
 }
 
 // ShowOpenFileDialog shows the file open dialog for EML files
@@ -497,3 +497,10 @@ func (a *App) OpenDefaultAppsSettings() error {
 	cmd := exec.Command("cmd", "/c", "start", "ms-settings:defaultapps")
 	return cmd.Start()
 }
+
+func (a *App) IsDebuggerRunning() bool {
+	if a == nil {
+		return false
+	}
+	return utils.IsDebugged()
+}