Provide embedding manager (#16)

* Provide the Embedding management UI

* Update Fastembed documentation

* Add validation when adding / updating embeddings

* Stop using the old ktem embeddings manager

* Set default local embedding models

* Move the local embeddings below in flowsettings

* Update flowsettings

libs/ktem/ktem/pages/admin/__init__.py

@@ -1,6 +1,7 @@
 import gradio as gr
 from ktem.app import BasePage
 from ktem.db.models import User, engine
+from ktem.embeddings.ui import EmbeddingManagement
 from ktem.llms.ui import LLMManagement
 from sqlmodel import Session, select
 
@@ -17,9 +18,12 @@ class AdminPage(BasePage):
             with gr.Tab("User Management", visible=False) as self.user_management_tab:
                 self.user_management = UserManagement(self._app)
 
-        with gr.Tab("LLM Management") as self.llm_management_tab:
+        with gr.Tab("LLMs") as self.llm_management_tab:
             self.llm_management = LLMManagement(self._app)
 
+        with gr.Tab("Embeddings") as self.llm_management_tab:
+            self.emb_management = EmbeddingManagement(self._app)
+
     def on_subscribe_public_events(self):
         if self._app.f_user_management:
             self._app.subscribe_event(