Chore: Enable golangci-lint

Add a GitHub actions workflow to run golangci-lint.

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

jsonrpc.go

@@ -195,8 +195,7 @@ func rpcSetEDID(edid string) error {
 
 	// Save EDID to config, allowing it to be restored on reboot.
 	config.EdidString = edid
-	SaveConfig()
-
+	_ = SaveConfig()
 	return nil
 }
 
@@ -596,18 +595,18 @@ func rpcSetActiveExtension(extensionId string) error {
 		return nil
 	}
 	if config.ActiveExtension == "atx-power" {
-		unmountATXControl()
+		_ = unmountATXControl()
 	} else if config.ActiveExtension == "dc-power" {
-		unmountDCControl()
+		_ = unmountDCControl()
 	}
 	config.ActiveExtension = extensionId
 	if err := SaveConfig(); err != nil {
 		return fmt.Errorf("failed to save config: %w", err)
 	}
 	if extensionId == "atx-power" {
-		mountATXControl()
+		_ = mountATXControl()
 	} else if extensionId == "dc-power" {
-		mountDCControl()
+		_ = mountDCControl()
 	}
 	return nil
 }
@@ -728,7 +727,7 @@ func rpcSetSerialSettings(settings SerialSettings) error {
 		Parity:   parity,
 	}
 
-	port.SetMode(serialPortMode)
+	_ = port.SetMode(serialPortMode)
 
 	return nil
 }