* added log tab

* added references text box
* added options to choose embedding models

backend/logger.py

@@ -0,0 +1,33 @@
+import gradio as gr
+import sys
+
+
+class Logger:
+    """
+    Logger class to redirect the output to a file.
+    will be used to the log textbox in the frontend.
+
+    Adapted from  : https://github.com/gradio-app/gradio/issues/2362#issuecomment-1424446778
+    """
+    def __init__(self, filename):
+        self.terminal = sys.stdout
+        self.log = open(filename, "w")
+
+    def write(self, message):
+        self.terminal.write(message)
+        self.log.write(message)
+
+    def flush(self):
+        self.terminal.flush()
+        self.log.flush()
+
+    def isatty(self):
+        return False
+
+
+def read_logs():
+    sys.stdout.flush()
+    with open("../temp_file/output.log", "r") as f:
+        return f.read()
+
+