Add ask method for AsyncBard

[jjkoh95]

Description

Add ask method for AsyncBard -- code taken from sync version core.py

Related Issue

• Include extension data, eg Google Flight #207

Motivation and Context

Expose the same interface for async client (to use extensions, eg google flights, google hotels)

How Has This Been Tested?

Install package

pip install git+https://github.com/jjkoh95/Bard-API.git@async-ask-method

Sample test code

bard = BardAsync(token=c.PSID)
if c.PSIDTS: bard.cookie_dict["__Secure-1PSIDTS"] = c.PSIDTS
if c.PSIDCC: bard.cookie_dict["__Secure-1PSIDCC"] = c.PSIDCC
flights = await bard.ask("@google Flights Search me one way flight for 1 December 2023 from Bangkok, Thailand to Taipei, Taiwan, 2 people.")
print("len(flights.drafts)", len(flights.drafts))

Screenshots (if appropriate):