Adds await-maven-central-package

[JayShortway]

Description

Adds a job and a step named await-maven-central-package, which will wait (with timeout) for a package to become available in Maven Central. Usage looks like this:

      - revenuecat/await-maven-central-package:
          coordinates: |
            com.revenuecat.purchases:purchases:x.y.z
            com.revenuecat.purchases:purchases-ui:x.y.z

Integrated here: RevenueCat/purchases-android#3292

[RCGitBot]

Your development orb has been published. It will expire in 30 days.
You can preview what this will look like on the CircleCI Orb Registry at the following link:
https://circleci.com/developer/orbs/orb/revenuecat/sdks-common-config?version=dev:8dc0a6a1e3cff28bb5393175d0a1c4dad95e5ec5

[tonidero]

Just a comment... But I won't block the PR because of this :)

[tonidero]

TBH, I do prefer to avoid shell scripts since they are harder to read... But I do guess it's the most compatible approach that avoids having to install anything... It might be worth running on a node machine and use typescript instead... Or even move the whole script to the fastlane plugin so we can actually add tests for it?
But I wouldn't say it's a blocker. I'm ok keeping it like this since it indeed can keep the job minimal

[ajpallares]

Looks good!

I get Toni's comments, and I agree that ideally we should be able to add tests for this. But I also see the point of using a shell script so that the job can remain very lightweight.

I'm ok with either approach since the poll with timeout is fairly straightforward