Extra per-game data for matches

[Miss-Inputs]

This will probably (should) be in a separate repo, but we want the ability to load it. If we have some match_data.jsonc containing stuff like:

{
	"match_id": 516311,
	"games": [
		{"winner": 10704,
		"winner_name": "Josh",
		"winner_ingame_tag": ".-.",
		"loser": 4724,
		"loser_name": "Miss Inputs",
		"loser_ingame_tag": "Megan",
		"stage": "Hollow Bastion",
		"winner_character": {
			"id": 347,
			"costume": null //default
		},
		"loser_character": {
			"id": 313,
			"costume": "Maid Outfit",
			"alt": "Guest F",
			"custom_moveset": [1, 1, 3, 1]
		},
		{"winner": 10704,
		"winner_name": "Josh",
		"winner_ingame_tag": ".-.",
		"loser": 4724,
		"loser_name": "Miss Inputs",
		"loser_ingame_tag": "Megan",
		"stage": "Hollow Bastion",
		"winner_character": {
			"id": 347,
			"costume": null
		},
		"loser_character": {
			"id": 296,
			"costume": "Hibiscus",
		}
	]
}

We can then have a class that I'll need to find a name for that isn't Game because that's ambiguous, maybe MatchGame or something, and return that from a Match.games property.

Also CostumedCharacter (subclass of Character, has costume and alt properties, alt loads different data from character_info if present), and CustomizedCharacter (subclass of CostumedCharacter, has .neutral_special/.side_special/etc properties returning int, and also just .moveset_name which is all of them combined or "default", "1131" in the first game there)

Should be able to create per-game data from start.gg when there's character data inputted there (hmm, maybe we need a function on Match to get the start.gg set ID in the event), or watch videos, and then start writing down stuff for my own matches.