Aseprite Atlas repeat value to follow editor convention

• Flixel version: 5.4.1

Aseprite editor behavior is as follows:

Currently, AseAtlas parses the loops value as:

inline function get_loops()
{
	return this != null && toInt() > 0;
}

However, in the Aseprite editor, tags default to looping, represented by the Repeat field on the tag being unchecked.

Current Flixel parsed behavior:

Desired Flixel parsed behavior:

With this behavior, the only gap between Aseprite and Flixel is in the case where Repeat is >1, as Flixel does not have a built-in notion of playing an animation x times.

Start at the AseAtlas get_loops() parser shown in the issue and compare its result with the listed Aseprite Repeat states. Update the parsed loops behavior to match the desired table, then verify that unchecked Repeat loops and a repeat value of 1 does not loop, while values greater than 1 remain looping.