Add zon files with tags for each song

[careeoki]

following the proposal here: PixelGuys/Cubyz#732 (comment)

This will make it faster to implement the new music in the future.

It would make sense to use the sets of tags that biomes already have:

• (hot, temperate, cold)
• (lush, balanced, barren)
• (wet, neitherWetNorDry, dry)
• (mountain, lowTerrain)

alongside tags for time and mood or whatever else, i.e. (day, night) (intense, serious, relaxing, playful) (cave, sky_islands, root)

adventurous.zig.zon

.{
	.tags = .{
		.serious,
		.mountain,
		.temperate,
		.cold,
		.balanced,
		.barren,
		.day,
		.night,
	},
}