Add Welcome bot

[krionbsd]

What does this PR do?

Add Welcome bot

[bryceml]

can we put links to all the resources mentioned?

   Community Wiki
    Salt’s Contributor Guide
    Join our Community Slack
    IRC on Freenode
    SaltStack YouTube channel
    SaltStackInc Twitch channel```

[krionbsd]

can we put links to all the resources mentioned?

   Community Wiki
    Salt’s Contributor Guide
    Join our Community Slack
    IRC on Freenode
    SaltStack YouTube channel
    SaltStackInc Twitch channel```

yeah, forgot it, done

[ScriptAutomate]

Some suggestions on adding links to our Code of Conduct.

I'm also wondering whether we should need anything in here about the Working Groups? New contributors may not know of them. Maybe an additional link like:

- [SaltStack Working Groups](https://github.com/saltstack/community)

Rendering to:

• SaltStack Working Groups

Though, I do think we should review and update the community repository README.md file, along with information about the docs-hub Documentation Working Group.

Tagging @cassandrafaris and @sagetherage for input^

[DmitryKuzmenko]

Probably it'd be good to add a direct link to Cassandra's profile in SaltCommunity Slack. But what Slack gives to me https://saltstackcommunity.slack.com/team/UQP614KNG doesn't work in my environment.

[ScriptAutomate]

Probably it'd be good to add a direct link to Cassandra's profile in SaltCommunity Slack. But what Slack gives to me https://saltstackcommunity.slack.com/team/UQP614KNG doesn't work in my environment.

The link to her profile properly opens when I open that link in Slack, for me.

[sagetherage]

Some suggestions on adding links to our Code of Conduct.

I'm also wondering whether we should need anything in here about the Working Groups? New contributors may not know of them. Maybe an additional link like:

- [SaltStack Working Groups](https://github.com/saltstack/community)

Rendering to:

* [SaltStack Working Groups](https://github.com/saltstack/community)

Though, I do think we should review and update the community repository README.md file, along with information about the docs-hub Documentation Working Group.

Tagging @cassandrafaris and @sagetherage for input^

That is fine, those can be separate PRs in those repositories, correct? I can create issues for work to be done, but I cannot do that work this week, perhaps in 2 or 3 weeks.

[krionbsd]

https://saltstackcommunity.slack.com/team/UQP614KNG

doesn't work for me in browser, I think providing the email makes more sense though, as not everyone is ready to join the slack to ask the questions

[krionbsd]

re-run full windows