[Feature] add google ai embedder (#1019)

Co-authored-by: Deven Patel <deven298@yahoo.com>

embedchain/embedder/google.py

@@ -0,0 +1,31 @@
+from typing import Optional
+
+import google.generativeai as genai
+from chromadb import EmbeddingFunction, Embeddings
+
+from embedchain.config.embedder.google import GoogleAIEmbedderConfig
+from embedchain.embedder.base import BaseEmbedder
+from embedchain.models import VectorDimensions
+
+
+class GoogleAIEmbeddingFunction(EmbeddingFunction):
+    def __init__(self, config: Optional[GoogleAIEmbedderConfig] = None) -> None:
+        super().__init__()
+        self.config = config or GoogleAIEmbedderConfig()
+
+    def __call__(self, input: str) -> Embeddings:
+        model = self.config.model
+        title = self.config.title
+        task_type = self.config.task_type
+        embeddings = genai.embed_content(model=model, content=input, task_type=task_type, title=title)
+        return embeddings["embedding"]
+
+
+class GoogleAIEmbedder(BaseEmbedder):
+    def __init__(self, config: Optional[GoogleAIEmbedderConfig] = None):
+        super().__init__(config)
+        embedding_fn = GoogleAIEmbeddingFunction(config=config)
+        self.set_embedding_fn(embedding_fn=embedding_fn)
+
+        vector_dimension = VectorDimensions.GOOGLE_AI.value
+        self.set_vector_dimension(vector_dimension=vector_dimension)