Chore: Enable golangci-lint

Add a GitHub actions workflow to run golangci-lint.

Signed-off-by: SuperQ <superq@gmail.com>

display.go

@@ -211,7 +211,7 @@ func startBacklightTickers() {
 	// Don't start the tickers if the display is switched off.
 	// Set the display to off if that's the case.
 	if config.DisplayMaxBrightness == 0 {
-		setDisplayBrightness(0)
+		_ = setDisplayBrightness(0)
 		return
 	}
 
@@ -221,7 +221,7 @@ func startBacklightTickers() {
 		defer dimTicker.Stop()
 
 		go func() {
-			for {
+			for { //nolint:gosimple
 				select {
 				case <-dimTicker.C:
 					tick_displayDim()
@@ -236,7 +236,7 @@ func startBacklightTickers() {
 		defer offTicker.Stop()
 
 		go func() {
-			for {
+			for { //nolint:gosimple
 				select {
 				case <-offTicker.C:
 					tick_displayOff()