[Bug] Hinge solver does not consider all the rules

[T0nyX1ang]

In the rules of Hinge in puzz.link, the following rule is not considered:

• NG: The region border which separates a block is not continuous.

However, this rule should consider many certain cases. One simpler approach is to only check for border_color_connected rule in the sense of adj_type = 8, but it does not cover all the cases. Another approach is to consider the symmetry axis that cuts the block, but this should consider too many special cases.

Fortunately, there are not problems that utilize this rule now, so we will just delay this issue.