feat: add dev mode for app

[longxiaofei]

Currently, pygwalker supported to use dev mode in jupyter to develop froentend app.

1. clone pygwalker repo

git clone git@github.com:Kanaries/pygwalker.git
 
cd pygwalker

2. run froentend app

cd app

yarn

yarn dev

3. run jupyter lab

pip install -e .

pip install jupyterlab jupyter_server_proxy

jupyter lab --ServerProxy.servers="{'pyg_dev_app': {'absolute_url': True, 'port': 8769, 'timeout': 30}}"

4. run code in jupyter lab

import pandas as pd
import pygwalker as pyg

pyg.GlobalVarManager.set_component_url("/pyg_dev_app/") # use dev frontend app

df = pd.read_csv("xxxx")

walker = pyg.walk(df)