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/Execution/Templates/DescendTemplate.cs

@@ -54,19 +54,21 @@ namespace MinecraftClient.Pathing.Execution.Templates
             if (_tickCount > 200)
                 return TemplateState.Failed;
 
-            physics.Pitch = TemplateHelper.CalculatePitch(dx, dy - 1.62, dz);
+            float targetYaw = TemplateHelper.CalculateYaw(dx, dz);
+            float targetPitch = TemplateHelper.CalculatePitch(dx, dy, dz);
+            physics.Pitch = TemplateHelper.SmoothPitch(physics.Pitch, targetPitch);
 
             if (physics.OnClimbable)
             {
                 if (horizDistSq > 0.25)
                 {
-                    physics.Yaw = TemplateHelper.CalculateYaw(dx, dz);
+                    physics.Yaw = TemplateHelper.SmoothYaw(physics.Yaw, targetYaw);
                     input.Forward = true;
                 }
             }
             else if (horizDistSq > 0.01)
             {
-                physics.Yaw = TemplateHelper.CalculateYaw(dx, dz);
+                physics.Yaw = TemplateHelper.SmoothYaw(physics.Yaw, targetYaw);
                 input.Forward = true;
             }