New Feature: ChartAsync

- Added the ChartAsync class, allowing for more sophisticated Charts and SubCharts.
- Symbol searching, timeframe selectors, and more is now possible with this varation of Chart.

`QtChart` and `WxChart` have access to all the methods that `ChartAsync` has, however they utilize their own respective event loops rather than asyncio.

New Feature: `StreamlitChart`
- Chart window that can display static data within a Streamlit application.

Removed the `subscribe_click` method.

examples/6_callbacks/callbacks.py

@@ -1,18 +0,0 @@
-import pandas as pd
-from lightweight_charts import Chart
-
-
-def on_click(bar: dict):
-    print(f"Time: {bar['time']} | Close: {bar['close']}")
-
-
-if __name__ == '__main__':
-
-    chart = Chart()
-
-    df = pd.read_csv('ohlcv.csv')
-    chart.set(df)
-
-    chart.subscribe_click(on_click)
-
-    chart.show(block=True)