Add python webui & Add simple run shell script

run_web_demo.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+cd "$(dirname "$0")"
+thisDir=$(pwd)
+
+function performInstall() {
+    set -e
+
+    pushd "$thisDir"
+    pip3 install -r requirements.txt
+    pip3 install gradio mdtex2html scipy
+
+    if [[ ! -d flash-attention ]]; then
+        if ! git clone -b v1.0.8 https://github.com/Dao-AILab/flash-attention; then
+            echo "Clone flash-attention failed, please install it manually."
+            return 0
+        fi
+    fi
+
+    cd flash-attention &&
+        pip3 install . &&
+        pip3 install csrc/layer_norm &&
+        pip3 install csrc/rotary ||
+        echo "Install flash-attention failed, please install it manually."
+    popd
+}
+
+echo "Starting WebUI..."
+
+if ! python3 web_demo.py; then
+    echo "Run demo failed, install the deps and try again? (y/n)"
+    # auto perform install if in docker
+    if [[ -t 0 ]] && [[ -t 1 ]] && [[ ! -f "/.dockerenv" ]]; then
+        read doInstall
+    else
+        doInstall="y"
+    fi
+
+    if ! [[ "$doInstall" =~ y|Y ]]; then
+        exit 1
+    fi
+
+    echo "Installing deps, and try again..."
+    performInstall && python3 web_demo.py
+fi