feat: Implement main application shell with navigation and color scheme toggle

- Added Appshell component with responsive navbar and main content area
- Integrated ColorSchemeToggle for light/dark mode switching
- Created Welcome component with styled title and introductory text
- Developed ChatPage for LLM interaction with WebSocket support
- Implemented Biblioteca for managing notes with rich text editor
- Added LoginPage for user authentication with error handling
- Introduced MessageList and MessageBubble components for chat messages
- Styled components with CSS modules for consistent design

domains/Llms/Embedders/Base_Embedder.py

@@ -0,0 +1,13 @@
+from abc import ABC, abstractmethod
+from typing import List
+
+class EmbedderABC(ABC):
+    @abstractmethod
+    def encoder(self, text: str) -> List[float]:
+        """Genera los embeddings para un texto dado."""
+        pass
+
+    @abstractmethod
+    def dimension_number(self) -> int:
+        """Devuelve la dimensión del modelo de embedding."""
+        pass