More options for item sorting

[SSM240]

Bit of a bigger feature this time, this overhauls the sorting settings to be more customizable.

• Tier Order: A string setting that allows you to define the order in which item tiers should be sorted, with each tier separated by a space. Duplicate or invalid tiers are simply ignored, and missing tiers are added afterward according to the game's internal tier ordering. Defaults to Lunar VoidBoss Boss VoidTier3 Tier3 VoidTier2 Tier2 VoidTier1 Tier1. This replaces the Tier Descending settings.
• Tier Order Preset Buttons: Allows you to choose between two presets for the Tier Order option, descending (same as default) and ascending (reverse of default). Mostly for convenience since I killed the Tier Descending checkbox, as well as a convenient way to get back to the default if you somehow mess up the setting.
• Combine Normal and Void Tiers: This causes void items to be sorted alongside their normal tiers (e.g. Lysate Cell is sorted as if it were a normal green item) instead of being considered separate tiers.
• Scrap Sorting: Replaces the "Separate Scrap" checkbox with a tri-state setting, with Start, End, and Mixed options. I also made it so that scrap always respects your tier sorting settings.

Code-wise, the things worth pointing out / commenting on are:

• the removal of the descendingTier param of SortItems (no, I didn't refactor it more thoroughly... sorry :P)
• changing the sorting settings now sets initialized to false, which re-populates tierMatcher and itemTierLists from scratch (yes I made sure this also clears them first)
• the preset buttons have to manually change the RiskOfOptions input field, just changing the value of the setting isn't enough
• using CombineVoidTiers just makes it pretend that void items are the corresponding normal tier at sorting time
• the DictToString method I added to Utils is for a debug log that shows the state of tierMatcher after initialization is done... maybe this could be removed, but I also think it might not be a terrible idea to leave in, shouldn't be too spammy since it should only print once on first run start or after changing settings
  • also, if you see a tier simply labeled as 11, that's the equipment tier, which doesn't have an entry in the ItemTier enum (and should never show up in the inventory anyway)

Considerations / known issues:

• I also removed the "Sort Scrapper Tier Descending" setting as part of the overhaul, since it seemed a bit out of place now (it'd just reverse the order set in the tier order option). This is technically a regression, since you can no longer sort tiers in the scrapper differently from in the inventory. There could be a "Scrapper Tier Order" setting if this is considered important, but I didn't want to put in the effort without knowing if anyone even cares about that.
• Sometimes (seemingly randomly), changing the sort settings in the Risk of Options menu doesn't immediately update the inventory display in-game. I'm not sure why, since it's definitely still running the initialization and sorting code for the inventory display, it's just not changing the UI. It does seem to always update properly when picking up a new item or changing stages, though.
• Is it a good idea to change the default tier ordering like I have? I'm inclined to say this is a better default than the reverse of the game's internal tier ordering, but I might also be biased... or maybe I'm just overthinking things and it's not a big deal 😅

[SSM240]

Just thought of a potentially better way to handle the presets thing - if it's possible to create a dropdown that's not directly tied to a setting that gets saved, we could use that for presets instead, and add more of them (like "Legacy" ones that use the current tier sorting?) without taking up a bunch of space in the menu. I'll have to look at that later when I get the chance.

(EDIT: this might not be possible actually, ChoiceOption seems to always expect there to be a ConfigEntry... maybe if we create our own option class but that feels like overkill 😅)