feat: Async Support with httpx 🔥

[drish]

Introduces async support using the httpx library.

• Base extra_requires setup
• Async requests module setup
• Api Keys module
• Audiences module
• Broadcasts module
• Contacts module
• Domains module
• Emails module
• Batch Emails module

SDK async version

1. Users will need to install the async version of the sdk (extra-requries) with: pip install resend[async]

2. Set the default_http_client:

import resend
# Set up async HTTP client
resend.default_http_client = resend.HTTPXClient()

3. call the async version method (suffixed with _async):

email: resend.Email = await resend.Emails.send_async(params)

[pedroimpulcetto]

wow, I loved this Async support!!! great job @drish

[ojh]

@bukinoshita @felipevolpone Is there any update on this? Are there any outstanding tasks that any of us could potentially help with to get this PR unblocked and merged?

[drish]

@bukinoshita @felipevolpone Is there any update on this? Are there any outstanding tasks that any of us could potentially help with to get this PR unblocked and merged?

@ojh i had to re-prioritize some work and this ended up having to wait a bit. I'll be working on this back again this coming week, should be very close to wrap up.