Add 26.3 support

[im-a-bird]

Ports RedstoneTools to Minecraft 26.3. Coded with assistance of Claude, and built cleanly against actual 26.3 game-jar / fabric-api / malilib.

Changes:

Added the 26.3 stonecutter version target

Fixed the Items.WHITE_SHULKER_BOX → Items.DYED_SHULKER_BOX.white() API change (dyed items were consolidated in 26.3)

Fixed RedStoneWireBlock → RedstoneWireBlock rename

Fixed Minecraft.screen moving to Minecraft.gui.screen()

Rewrote the AirPlace block-outline renderer for 26.3's new submit-node rendering pipeline (LevelRenderContext.submitNodeCollector() is used instead of older buffer/mixin-based approach)

Excluded malilib-api's stale transitive malilib-fabric dependency pin so it resolves against the actually installed version instead

Tested manually in-game on 26.3 (Fabric loader 0.19.5).

Note: malilib-api does not yet have an official 26.3 build, so currently depends on their 26.2 build.

[kr1viah]

No AI PRs please.

[im-a-bird]

@kr1viah Just curious what the concern is, care to elaborate?

[kr1viah]

half of the code is nonsensical and malilib api 26.3 isn't out yet so it doesn't make sense to update it yet

[im-a-bird]

@kr1viah True, however it works based on the 26.2 build of malilib api which is compatible if you remove the code causing the crash from malilib api, and it should be compatible with the new version when it comes out. I reopened a PR here (#430) but if it is just the update in general I can stop altogether.