[New Feature] Implement Team Mission additions from RA2/YR

[Crimsonum]

Description:

RA2/YR has some handy team missions (script actions) that TS/FS could use. These are:

• 53, Gather (at enemy base)
• 54, Regroup (at friendly base)
• 58, Move To Friendly Structure
• 59, Attack Structure At Waypoint

Possible Implementation:

Add the mentioned team missions as-is, or some modified versions that achieve similar results.

[E1Elite]

YR, Gather at enemy base script takes 0 as parameter and uses AISafeDistance in rules to get the cell where to gather. Ares allows positive and negative vales in parameter to be added or deducted from the AISafeDistance value to calculate the target cell. Ares also introduces AIFriendlyDistance rules key to do the same with Regroup at friendly base script.