feat: added RIT and XIT for Icom

app.go

@@ -7842,6 +7842,30 @@ func (a *App) IcomSetScopeMode(fixed bool) error {
 	return a.cat.IcomDo(func(ic cat.IcomController) error { return ic.SetScopeMode(fixed) })
 }
 
+// IcomSetRIT sets the RIT/ΔTX offset in signed Hz.
+func (a *App) IcomSetRIT(hz int) error {
+	if a.cat == nil {
+		return fmt.Errorf("cat not initialized")
+	}
+	return a.cat.IcomDo(func(ic cat.IcomController) error { return ic.SetRIT(hz) })
+}
+
+// IcomSetRITOn toggles RIT.
+func (a *App) IcomSetRITOn(on bool) error {
+	if a.cat == nil {
+		return fmt.Errorf("cat not initialized")
+	}
+	return a.cat.IcomDo(func(ic cat.IcomController) error { return ic.SetRITOn(on) })
+}
+
+// IcomSetXITOn toggles ΔTX (XIT).
+func (a *App) IcomSetXITOn(on bool) error {
+	if a.cat == nil {
+		return fmt.Errorf("cat not initialized")
+	}
+	return a.cat.IcomDo(func(ic cat.IcomController) error { return ic.SetXITOn(on) })
+}
+
 func (a *App) IcomSetPTT(on bool) error {
 	if a.cat == nil {
 		return fmt.Errorf("cat not initialized")