Overlapping target field in omnigenity

[rahulgaur104]

The target field almost always overlaps with itself as one increases its resolution (L_x, M_x, N_x, L_B, or M_B).

Another related effect is the non-differentiable target field at the edge.

To reproduce this, run any omnigenity optimization with a practical aspect ratio (< 10) and L_x, M_x, N_x, L_B, M_B >= 3

[unalmis]

Let me know if #1166 resolves this

[dpanici]

Is there an objective or penalty against intersecting contours we could use? to prevent or detect this when it happens