fix: show deprecation message on tns init

`tns init` command will be deleted in 6.0.0 release, so we need to show deprecation message when someone uses it.

Author: rosen-vladimirov

lib/commands/init.ts

@@ -2,9 +2,11 @@ export class ProjectInitCommand implements ICommand {
 	public allowedParameters: ICommandParameter[] = [];
 	public enableHooks = false;
 
-	constructor(private $projectInitService: IProjectInitService) { }
+	constructor(private $logger: ILogger,
+		private $projectInitService: IProjectInitService) { }
 
 	public async execute(args: string[]): Promise<void> {
+		this.$logger.warn("This command is deprecated and it will be removed in the next major release of NativeScript");
 		return this.$projectInitService.initialize();
 	}
 }