redo noembeddingphrase to return an empty embedding

anansyTypes/structures/lexeme.py

@@ -15,9 +15,10 @@ class Lexeme(ABC):
         pass
 
     @property
+    @abstractmethod
     def embedding(self) -> Embedding:
         """Embedding(s) associated with the lexeme."""
-        raise NotImplementedError("Embeddings are not supported") #added to allow for NoEmbeddingPhrase
+        pass
 
     @classmethod
     @abstractmethod

anansyTypes/structures/phrase.py

@@ -35,6 +35,11 @@ class NoEmbeddingPhrase(Lexeme):
     @property
     def content(self) -> str:
         return self._content
+    
+    @property
+    def embedding(self) -> Embedding:
+        return self._embedding
+    
     @classmethod
     def from_dict(cls, data: dict) -> "Phrase":
         return cls(