feat: add LocalAI local embedding model support (#1021)

Co-authored-by: StyleZhang <jasonapring2015@outlook.com>

api/core/model_providers/models/embedding/localai_embedding.py

@@ -0,0 +1,29 @@
+from langchain.embeddings import LocalAIEmbeddings
+
+from replicate.exceptions import ModelError, ReplicateError
+
+from core.model_providers.error import LLMBadRequestError
+from core.model_providers.providers.base import BaseModelProvider
+from core.model_providers.models.embedding.base import BaseEmbedding
+
+
+class LocalAIEmbedding(BaseEmbedding):
+    def __init__(self, model_provider: BaseModelProvider, name: str):
+        credentials = model_provider.get_model_credentials(
+            model_name=name,
+            model_type=self.type
+        )
+
+        client = LocalAIEmbeddings(
+            model=name,
+            openai_api_key="1",
+            openai_api_base=credentials['server_url'],
+        )
+
+        super().__init__(model_provider, client, name)
+
+    def handle_exceptions(self, ex: Exception) -> Exception:
+        if isinstance(ex, (ModelError, ReplicateError)):
+            return LLMBadRequestError(f"LocalAI embedding: {str(ex)}")
+        else:
+            return ex