feat: add diagonal ascend/descend moves, fix pitch, smooth look angles

- Add MoveDiagonalAscend and MoveDiagonalDescend for "corner" moves:
  step diagonally around a wall edge while ascending/descending 1 block.
  Requires at least one intermediate cardinal direction to be passable.

- Fix pitch calculation: look toward target's eye level (same height
  delta as feet delta) instead of subtracting eye height, which caused
  the player to stare at the ground during flat walks.

- Add Yaw/Pitch smoothing via SmoothYaw/SmoothPitch in TemplateHelper.
  Max 35 deg/tick for yaw, 25 deg/tick for pitch. Prevents instant
  camera snaps between path segments while still being responsive
  enough for sprint-jumps and tight maneuvers.

- Apply smoothing to all five action templates (Walk, Ascend, Descend,
  Climb, SprintJump).

Made-with: Cursor

MinecraftClient/Pathing/Core/AStarPathFinder.cs

@@ -44,6 +44,16 @@ namespace MinecraftClient.Pathing.Core
             moves.Add(new MoveDiagonal(-1, 1));
             moves.Add(new MoveDiagonal(-1, -1));
 
+            // Diagonal ascend/descend: corner jumps and drops
+            foreach (int dx in offsets)
+            {
+                foreach (int dz in offsets)
+                {
+                    moves.Add(new MoveDiagonalAscend(dx, dz));
+                    moves.Add(new MoveDiagonalDescend(dx, dz));
+                }
+            }
+
             moves.Add(new MoveClimb(true));
             moves.Add(new MoveClimb(false));