feat(sitauto): improve wall-aware seated look flow with delayed post-sit orientation

[boscv]

Rework sitAuto wall-aware look behavior to make direction selection deterministic
by distance and more natural after sitting.

Before

• sitAuto_look_from_wall did not reliably prioritize the nearest wall as a
  reference for orientation.
• Direction outcomes could look inconsistent in practice, especially with small
  wall setups.
• Orientation changes could feel abrupt depending on body/head mapping.

After

• sitAuto_look_from_wall is treated as a search range around the character.
• Non-walkable cells in range are scanned, nearest wall distance is prioritized,
  and ties are resolved randomly among equally near candidates.
• Facing is computed as the opposite direction of the selected wall.
• Seated orientation now applies a natural pose:
  • body is offset by one side step
  • head is set relatively so gaze still points away from the wall
• If no wall is found in range, behavior falls back to sitAuto_look.
• Added support for sitAuto_look_delay to postpone orientation after ACTION_SIT.

Fallbacks and safety

• If no wall is found in range, fallback to sitAuto_look.
• If delay is invalid/negative, normalize delay to 0.
• Preserve non-blocking behavior by scheduling look time and dispatching later.

PS: Besides the position being changed, it will not be seen on client XKore modes (yet),
but can be checked on console using this command:

eval message "Body=$char->{look}{body} Head=$char->{look}{head}\n", "info";

[Henrybk]

Maybe the get closestWalls could be its own sub in Utils ou Field? It could be used in many other places in the code (eg. runFromTarget, which right now doesn't use nearest wall logic and can get trapped)

[boscv]

Maybe the get closestWalls could be its own sub in Utils ou Field? It could be used in many other places in the code (eg. runFromTarget, which right now doesn't use nearest wall logic and can get trapped)

CAN DO! That's a great ideia