Allow the application name to be configurable in settings (#80)

* Make app name configurable

* Use app name in browser tab

libs/ktem/ktem/pages/chat/chat_panel.py

@@ -9,7 +9,7 @@ class ChatPanel(BasePage):
 
     def on_building_ui(self):
         self.chatbot = gr.Chatbot(
-            label="Kotaemon",
+            label=self._app.app_name,
             placeholder=(
                 "This is the beginning of a new conversation.\nMake sure to have added"
                 " a LLM by following the instructions in the Help tab."

libs/ktem/ktem/pages/login.py

@@ -31,7 +31,7 @@ class LoginPage(BasePage):
         self.on_building_ui()
 
     def on_building_ui(self):
-        gr.Markdown("# Welcome to Kotaemon")
+        gr.Markdown(f"# Welcome to {self._app.app_name}!")
         self.usn = gr.Textbox(label="Username", visible=False)
         self.pwd = gr.Textbox(label="Password", type="password", visible=False)
         self.btn_login = gr.Button("Login", visible=False)