fix: build PyICU with Toolforge ICU paths

[axif0]

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have ran the ./pre-commit executable as well as make lint and have fixed all reported issues

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Description

• Fixes Toolforge deployment by building PyICU from source. As toolforge has no pkg-config/icu-config, so PyICU cannot auto-detect ICU. Manual env vars match Toolforge.md which solves the problem.

• Gate update-and-deploy on scribe-org/Scribe-Server so forks only run check-repository

Related issue

Closes #43

[github-actions]

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[github-actions]

Maintainer Checklist

The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

• Tests for changes have been written and the continuous integration (CI) workflows within the PR checks do not indicate new errors in the files changed

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

[andrewtavis]

Thanks so much for this, @axif0! Do you want to take a first look and we can try to merge it this weekend, @DeleMike?

[andrewtavis]

praise: All's looking great here, @axif0! Really great to have this coming into the project. Changes make total sense. I'll bring in the minor ones still needed from #60 :)