[FEATURE] Install GH Slack plugin in #11_contributing channel

[smoya]

Why do we need this improvement?

Would be cool to post automatically in #11_contributing channel the link to GH issues that have been recently tagged as good-first-issue.

Context:

We see people keeps posting things like:

Source: https://asyncapi.slack.com/archives/C02FK3YDPCL/p1702971865788819

Source: https://asyncapi.slack.com/archives/C02FK3YDPCL/p1702472169421199

Source: https://asyncapi.slack.com/archives/C02FK3YDPCL/p1704897216912089

How will this change help?

It will help people who are looking to get started with first contributions to any of the community repos.

Screenshots

No response

How could it be implemented/designed?

1. Install GH Slack app
2. Configure it by running the following commands in #11_contributing channel :

   /github subscribe asyncapi issues +label:"good first issue"
   /github unsubscribe asyncapi pulls commits releases deployments

🚧 Breaking changes

No

👀 Have you checked for similar open issues?

• [X] I checked and didn't find a similar issue

🏢 Have you read the Contributing Guidelines?

• [X] I have read the Contributing Guidelines

Are you willing to work on this issue?

None

cc @thulieblack @derberg

[smoya]

I requested the install, but seems like someone (I guess @thulieblack or @derberg) will need to connect?

[thulieblack]

@derberg 😏

[smoya]

This is now done 🎉