Scriptable Nearwall

[ProfLander]

Adds actor_hud_on_nearwall for intercepting and modifying the near-wall transforms from Lua.

It receives transform index, offset distance / direction, mutable offset matrix, and a mutable override flag for suppressing built-in behaviour. The barrel trace is updated after the offset is applied, so the crosshair and bullet impact point both respect it.

This should be sufficient to hook WCT's per-weapon offsetting logic into the new system without too much trouble. For demo purposes, I've uploaded my basic testing script as a gist. Drop it into gamedata, and weapons + devices should start tilting up instead of moving backward when approaching a wall with g_nearwall 2.

[ProfLander]

Had to rebase this back onto lander and apply a small patch to prevent compile error following the addition of SCOPE_ATTACH_IDX offset application in #196.