Feat/new UI (#13)

* new custom theme

* improve css: scrollbar, header, tabs and buttons

* update settings tab

* open file index selector by default

* update chat control panel

* update chat panel

* update file index page

* cap gradio<=4.22.0

* rename admin page

* adjust UI

* update flowsettings

* auto start in browser

* change colour for edit LLM page's button

libs/ktem/pyproject.toml

@@ -21,6 +21,7 @@ dependencies = [
     "sqlalchemy",
     "sqlmodel",
     "tiktoken",
+    "gradio>=4.0.0,<=4.22.0",
 ]
 readme = "README.md"
 license = { text = "MIT License" }