[ScopeMimicry] Updates the dump in the examples

[luizvilla]

Description

When working with the grid forming example, I have noticed a complex snippet necessary to dump the code.
This snippet has a far more simple and useful way of being done.

Action

Replace the download part of the application task by the following code:

if (!is_downloading) {
            printk("%d:", mode);
            printk("% 7.3f:", Vgrid_amplitude_ref);
            printk("% 7.3f:", I1_low_value);
            printk("% 7.3f:", I2_low_value);
            printk("% 7.3f:", V1_low_value);
            printk("\n");
        } else {
            scope.reset_dump();
            printk("begin record\n");
            while(scope.get_dump_state() != finished) {
                printk("%s", scope.dump_datas());
                task.suspendBackgroundUs(100);
            }
            printk("end record\n");
            is_downloading = false;
        }

This should provide the index of the end of dump. This information is used to reorganize the final plot and csv data structures.