Add --loglevel argument for command line log level control

Introduce support for setting the application's log level via a new --loglevel command line argument.
Log level is parsed early in initialization and can be set to DISABLED, ERROR, WARNING, INFO, or DEBUG (case-insensitive).
The RILogLevel enum now includes a DISABLED value.
Logger initialization in both console and GUI applications now respects the command line log level if provided, otherwise defaults to preference-based settings.

Fixes by clang-format

ApplicationLibCode/Application/Tools/RiaLogging.cpp

@@ -242,6 +242,26 @@ RILogLevel RiaLogging::logLevelBasedOnPreferences()
     return RILogLevel::RI_LL_INFO;
 }
 
+//--------------------------------------------------------------------------------------------------
+/// Parse a log level string and return the corresponding enum value
+/// @param logLevelString The string to parse (case-insensitive, whitespace is trimmed)
+/// @return The corresponding RILogLevel enum value, or std::nullopt if the string is invalid
+/// Valid values are: DISABLED, ERROR, WARNING, INFO, DEBUG
+//--------------------------------------------------------------------------------------------------
+std::optional<RILogLevel> RiaLogging::parseLogLevelString( const QString& logLevelString )
+{
+    QString upperString = logLevelString.toUpper().trimmed();
+
+    if ( upperString == "DISABLED" ) return RILogLevel::RI_LL_DISABLED;
+    if ( upperString == "ERROR" ) return RILogLevel::RI_LL_ERROR;
+    if ( upperString == "WARNING" ) return RILogLevel::RI_LL_WARNING;
+    if ( upperString == "INFO" ) return RILogLevel::RI_LL_INFO;
+    if ( upperString == "DEBUG" ) return RILogLevel::RI_LL_DEBUG;
+
+    // Return nullopt for invalid input
+    return std::nullopt;
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------