- Shortcut waypoints are pink now instead of blue. (barkley's ran into the issue of a shortcut waypoint on the main path too many times)
- Waypoint debug uses a shaded blue sphere sprite instead of a thok sprite, because it makes the color easier to see on different backgrounds.
- Use 1 splat for waypoint radius instead of shittons of orbs

Fixes shortcut pathfinding behavior when the entire shortcut's waypoints have the flag instead of only the entrance.

More Bot Improvements (Again (Again))

See merge request KartKrew/Kart!570

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

Rewrite mines

See merge request KartKrew/Kart!581

Invincibility updates

See merge request KartKrew/Kart!583

- You flash white while in invincibility
- Invincibility is not rainbow UNTIL you go above the initial timer.
- Increased visibility of the shield effect around invincible players.
- Invincibility sparkles have trailing afterimages.
- Disabled invincibility speed lines; they now use the normal speedlines but grey/rainbow. (The code/sprites will be used for something later.)
- Using invincibility adds time, instead of setting it.
- Player hitbox is finally bigger, to actually match the shadow size.

1 full second after entering a tripwire state, you can still go through tripwires

Get rid of the tons of extra objects it uses for sounds & collision, do it all from the actual object PLEASE...

Minor prep for 220430 test

See merge request KartKrew/Kart!576

Spindash tweaks

See merge request KartKrew/Kart!578