move snake config read functions into battlesnake template and use TemplateSnake as default Version of Snakes

snakes/__init__.py

@@ -11,7 +11,15 @@ SNAKE_REGISTRY = {
   "UltimateBattleSnake": "4.5.0",
 }
 
-def build_snake(selected_snake: str):
+DEFAULT_SNAKE_CONFIG = {
+  'apiversion': '1',
+  'author': '',
+  'color': '#888888',
+  'head': 'default',
+  'tail': 'default',
+}
+
+def build_snake(selected_snake:str):
   if selected_snake not in SNAKE_REGISTRY:
     raise ValueError(f"Unknown snake: {selected_snake}")
 
@@ -19,7 +27,7 @@ def build_snake(selected_snake: str):
   snake_class = getattr(snake_module, selected_snake)
   return snake_class()
 
-def get_snake_version(selected_snake: str) -> str | None:
+def get_snake_version(selected_snake:str) -> str|None:
   version = SNAKE_REGISTRY.get(selected_snake)
   if version is None:
     return None
@@ -31,5 +39,5 @@ class SnakeBuilder:
     return build_snake(selected_snake)
 
   @classmethod
-  def get_version(self, selected_snake: str) -> str | None:
+  def get_version(self, selected_snake:str) -> str|None:
     return get_snake_version(selected_snake)