Claims of Tower and Mine

[jzy-chitong56]

When detection the tower, it may be necessary to make a claim like detection mine
A building cannot be detected as capable of attacking the ground or air until it is completed
Some towers require upgrades before they can be attacked
So need to include both pre upgrade and under construction towers
Similarly, only checking whether it can be attacked will collect ancient trees, and there needs to be a rule to determine whether trees are included

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detection mine have a API -- IsUnitType(u,UNIT_TYPE_TOWNHALL)
So the campaign units do not need to be specially hard coded
But the tower doesn't have it, so still need to take into account the campaign units

#289

[jzy-chitong56]

After much consideration, I still think it's better to add it to the unit basic table