[feature] Add some new functions

[azhz1107cat]

1. Add drone launchers

2. Expand bomber airport buildings to three times their original size (for greater realism)

3. Expand city buildings to seven times their original size (for greater realism)

4. When a country grows to a certain scale, unclaimed lands tend to decrease, making expansion more difficult. (Last time, when I expanded to rank 4, there were almost no unclaimed lands near my borders — my only "way out" was to attack rank 1, -- a joke.) This issue needs improvement.

5. Add naval support (if there is enough free time —- a joke)

[ling-voc]

Do you know the principle of "the strong survive and the weak perish"? When you reach a certain scale, you have to attack other countries. This is also the case in reality. Once resources are exhausted, it comes down to competing for resources.