PR: Add Github action to close duplicate issues

[goanpeca]

This adds the action to handle duplicates and add a label.

Any thoughts @ccordoba12 ?

[ccordoba12]

Do we need a different repo per action? I mean, can't we have multiple actions in a single repo?

[ccordoba12]

Also, can we add more patterns to close duplicates?

[goanpeca]

Do we need a different repo per action? I mean, can't we have multiple actions in a single repo?

If we want to share them with "the world" or other repos we need to have it like that.

Also, can we add more patterns to close duplicates?

Sure, which ones?

[ccordoba12]

The error mentioned on issue #11086 is still reported a lot. Please add it to the list.

[goanpeca]

Will do!

[ccordoba12]

Ok, let's merge this one to see how it goes.

Thanks a lot @goanpeca for your help!! This is going to be very useful!

The base branch was changed.