[rasanaruto-lgtm]

Draft/WIP: brings our KartState work over from the sibling repo (rasanaruto-lgtm/mkw).

Adds the not-yet-decompiled KartState methods, in particular:

• updateCollisions - currently 86.99% on objdiff. The residual is purely MWCC register coloring (a {proxy, pe, var_r28} 3-cycle); all call/data bytes match.
• calcStartBoost, applyStartBoost, wrapCollisionFlags-style flag helpers, etc.

Also adds KartState::kartStateReload() to KartObjectProxy.hpp (reproduces an extra mKartState reload MWCC emits at a couple of RMW sites), and makes KartCollide's collision data public for updateCollisions access.

Unverified: I cannot build this tree here (no ROM), and KartState.hpp field names were kept as ours (mTop/_34/_70) - please sanity-check against current main before merging. Marked draft for that reason.

Companion: #13 (dol diff symbol-remap tooling).

[em-eight]

inadequate prompting

[rasanaruto-lgtm]

Re-approaching with the current, verified tree: #16 (updateCollisions at 99.7613%, builds clean).

Re: the "inadequate prompting" close here — that was fair. This PR was an unverified 86.99% WIP and its own body said it could not be built here. #16 is built (configure.py + ninja succeed, report.json produced) and carries the full derivation, including a measured argument that the final 2 objdiff units are allocator-locked on Wii/0x4201_127.