"Dr. Robotnik's Ring Racers" rebranding

See merge request KartKrew/Kart!590

Wasn't actually being displayed on the window before

Replaced most drrr (mostly only used in system / exe stuff) with the more verbose "ringracers"

More Bot Improvements (Again (Again))

See merge request KartKrew/Kart!570

It's really pointless on Flame Shield, and Lightning Shield is boring.

Flame Shield should just get a different passive.

- Rename to Lightning Shield (it keeps fucking me up when I want to kartgiveitem it to myself)
- Fix inflictors causing damage being considered damage hitlag. Fixes the player using Lightning Shield being in damage hitlag state (most notable in the DI branch because hurting someone with it lets you DI afterwards, which also fucks with your turning)
- Rewrote attack function to use custom blockmap search instead of P_NukeEnemies.
- It can no longer attack below you, only above & around you.
- Increased the attack radius, so that it actually lines up with the sprites...
- Fixed extremely inconsistent ring blockmap search by moving it to playerafterthink (don't ask me why)
- Rings get joulsted by Lightning Shield when you pass by them without
- Added MAXRADIUS to the blockmap checks for lightning shield & mines, to reduce blockmap inconsistencies

Add FX for powerup clash collision (implements #250)

Closes #250

See merge request KartKrew/Kart!587

Improve addfile performance

See merge request KartKrew/Kart!500

ANIMDEFS now only reports the "flats are disabled" warning for ANIMDEFs in the most recently loaded file.

Notably, this means there are no warnings produced if an added file contains no errors, reducing even MORE of the friction the addons menu has been experiencing in devbuilds lately.

* Allocate the "MISSING" patch only once, statically, at first boot via `missingpat`, and prevent it from being freed.
* Rework HU_UpdatePatch to HU_UpdateOrBlankPatch with a "required" boolean.
    * If desired graphic is not present in resources:
        * If required is true, return `missingpat`.
        * If false, return NULL as before (font compatibility).
    * Add an alias with the previous function signature, so you don't need to add a million `true`s everywhere.
* Remove a ton of irrelevant graphics the game attempts to cache only because of code inherited from vanilla SRB2.
* Remove the unused hudinfo system, also inherited from vanilla SRB2.

# Conflicts:
#	src/k_hud.c

Cap TryMove radius to 16x map scale

See merge request KartKrew/Kart!586

Brake dust

See merge request KartKrew/Kart!585

- Spawns outward from both front wheels, from outer wheel
only if brake-drifting.
- Scales with speed, up to 200%. Also applies to drift
sparks.

Fix GCC 12 warnings

See merge request KartKrew/Kart!584