feat: building layout

[raspersc2]

How this should be implemented is not yet determined, should initially support Terran

Could be some kind of function (cython?) (include_townhall so expanding on high ground is possible):

def get_building_positions(race, include_townhall, position, ramp_position, wall_off: bool) -> Dict[size, set[Point2]]:
    pass

Returns a dict in the following format:

{
    "2x2": {(50, 55), (15, 10)},
    "3x3": {(20, 21), (152, 8)},
    "5x5": {(23, 67)}
}

• Ensure large units can path
• Calculate on the fly based on position
• Probably should include radius based on position, and only allow structures at same terrain height as position
• Takes into account existing structures, creep, addons etc