README.md: add Gradle Native as an alternative
README.md: add Gradle Native as an alternative

dugilos/nar-maven-plugin,markjohndoyle/nar-maven-plugin,markjohndoyle/nar-maven-plugin,manu4linux/nar-maven-plugin,eyalg1972/nar-maven-plugin,manu4linux/nar-maven-plugin,dmakarov/nar-maven-plugin,markjohndoyle/nar-maven-plugin,dugilos/nar-maven-plugin,eyalg1972/nar-maven-plugin,dugilos/nar-maven-plugin,Oneplus/nar-maven-plugin,markjohndoyle/nar-maven-plugin,eyalg1972/nar-maven-plugin,maven-nar/nar-maven-plugin,Oneplus/nar-maven-plugin,heathn/nar-maven-plugin,manu4linux/nar-maven-plugin,markjohndoyle/nar-maven-plugin,dugilos/nar-maven-plugin,heathn/nar-maven-plugin,maven-nar/nar-maven-plugin,eyalg1972/nar-maven-plugin,maven-nar/nar-maven-plugin,dmakarov/nar-maven-plugin,Oneplus/nar-maven-plugin,maven-nar/nar-maven-plugin,eyalg1972/nar-maven-plugin,manu4linux/nar-maven-plugin,dugilos/nar-maven-plugin,dmakarov/nar-maven-plugin,heathn/nar-maven-plugin,heathn/nar-maven-plugin,Oneplus/nar-maven-plugin,dmakarov/nar-maven-plugin,Oneplus/nar-maven-plugin,manu4linux/nar-maven-plugin,heathn/nar-maven-plugin,dmakarov/nar-maven-plugin,maven-nar/nar-maven-plugin