Initial support for Germany Cold War (#518)

* Initial support of Germany Cold War terrain

* Updated with latest beacon import

* Updated changelog and ran black

* Fixed the GermanyCW landmap and naming scheme

* Temporarily changed the requirements for pydcs to my branch (will switch back when merged)

* Updated landmap for germanycw with even fewer exclusions

* Removed unnecessary changes

* Updated requirements to lastest pydcs

* Fixed naming issues for Germany

* Update pydcs to latest commit for GCW support

* Add landmap to game.theater.__init__

* Update requirements.txt

* Resolve PyCharm type-waring

* Updated pydcs and exclusion of germany

* Updated land and sea shapefiles for Germany Cold War with new map limits

---------

Co-authored-by: Raffson <Raffson@users.noreply.github.com>

game/theater/landmap.py

@@ -12,6 +12,7 @@ from dcs.mission import Mission
 from dcs.terrain.terrain import Terrain
 from shapely import geometry, LineString
 from shapely.geometry import MultiPolygon, Polygon
+import shapely as shp
 
 
 @dataclass(frozen=True)
@@ -28,6 +29,11 @@ class Landmap:
         if not self.sea_zones.is_valid:
             raise RuntimeError("Sea zones not valid")
 
+        # Generate Spatial Index using `prepare` to improve performance
+        shp.prepare(self.inclusion_zones)
+        shp.prepare(self.exclusion_zones)
+        shp.prepare(self.sea_zones)
+
     @cached_property
     def inclusion_zone_only(self) -> MultiPolygon:
         return self.inclusion_zones - self.exclusion_zones - self.sea_zones