[Utility] feat: add utilities to notify slack about a new library release.

[sayakpaul]

What does this PR do?

This is how such an automatic notification would look like (internal link): https://huggingface.slack.com/archives/C03HBN1C8CW/p1707889851090899.

Steps to create the webhook-enabled Slack Bot (documenting in case someone else finds it useful):

• Go to the Slack API website and create a new app.
• Choose the workspace you want to install your app to.
• In the 'Add features and functionality' section, choose 'Incoming Webhooks'.
• Activate incoming webhooks and create a new webhook for the channel you want to post messages to.
• Copy the webhook URL; you'll use it in your Python script to send messages to Slack.

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[sayakpaul]

This is wrongly crafted. In its current form, the bot will always notify the channel within a fixed interval. We need to make it conditional on the PyPI release status instead. Will look into it.

[LysandreJik]

cc @ydshieh who might have tips/comments about the Slack-related work (he's handling it from the transformers' POV)

[sayakpaul]

@ydshieh a gentle ping in case you want to exchange notes :)

[yiyixuxu]

Suggested change

	return {"tag_name": data["tag_name"], "url": data["html_url"]}
	return {"tag_name": data["tag_name"], "url": data["html_url"], "release_time" : data["published_at"}

we can maybe:

1. extract the published time the latest release here
2. compare with the current time and notify if it is less than 12 hours?

[ydshieh]

Hi @sayakpaul

I love the idea of having such notification!

In transformers, it uses from slack_sdk import WebClient and client.chat_postMessage, (it was that way before I joined), which is different from what you have done in this PR. So I won't have comments to provide here regarding this part.

As you know and mentioned by @yiyixuxu , the condition has to be adjusted. Also, at the end, we need to decide which libraries to watch for the notifications.

I would rather fail the script if the information could not be fetched instead of just printing a message.

[sayakpaul]

Closing this with #7270.