Adding Fuel Imbalance Advisory to EICAS

[raypurge]

Is your feature request related to a problem? If so, please describe.

Describe the feature you want implemented.
Adding Fuel imbalance Warning, if tank quantity is more than 450 gallon(1360kg)difference. I have to take a look again if its a Warning or advisory message.

References
has to be implemented into the panel.xml

	<Annunciation>
		<Type>Advisory</Type>
		<Text>FUEL IMBAL 1-4</Text>
		<Condition>
			<Or> 
			<GreaterEqual>
				<Subtract>
					<Simvar name="FUEL TANK LEFT AUX QUANTITY" unit="gallon"/>
					<Simvar name="FUEL TANK RIGHT AUX QUANTITY" unit="gallon"/>
				</Subtract>
				<Constant>450</Constant>
			</GreaterEqual>
				
			<GreaterEqual>
				<Subtract>
					<Simvar name="FUEL TANK RIGHT AUX QUANTITY" unit="gallon"/>
					<Simvar name="FUEL TANK LEFT AUX QUANTITY" unit="gallon"/>
					</Subtract>
				<Constant>450</Constant>
			</GreaterEqual>
			</Or>	
		</Condition>
	</Annunciation>

Additional context

Your Discord:

[ninjomcs]

hi, since you already have an implementation, you could make a pull request yourself if you'd like. let us know in discord if you need any assistance