Add support for more advanced PDF metadata

[mattleibow]

Description of Change

This PR is a WIP for adding better support for the PDF metadata. The new features are structure elements and other tags.

Bugs Fixed

• Fixes [FEATURE] Add support for Tagged PDFs #2046

API Changes

None.

Behavioral Changes

None.

Required skia PR

None.

PR Checklist

• Has tests (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Merged related skia PRs
• Changes adhere to coding standard
• Updated documentation

[mattleibow]

There are NuGet packages available for download to see if this is what you are expecting: https://dev.azure.com/xamarin/public/_build/results?buildId=115770&view=artifacts&pathAsName=false&type=publishedArtifacts

Go to the link (or the latest build) and then download the nuget artifact. It is best to install the 3.0.0-pr.2865.* packages so they don't clash with stable versions later on.

[mattleibow]

/azp run

[azure-pipelines]

Pull request contains merge conflicts.

[mattleibow]

@lol768 I have rebased and CI is running the build again. The artifacts expired because it has been a while, but after the build is done the artifact should be on the job.

Thanks for offering to test out the bits! Let me know if anything weird happens or if this is good to ship :)

[mattleibow]

I did not rebase hard enough :)

[lol768]

Thanks! I assume the artifacts will magically appear on https://dev.azure.com/xamarin/public/_build/results?buildId=127530&view=results in due course? Not super familiar with Azure DevOps 🙂

[mattleibow]

Not for PRs, only once they are merged. PR builds are only in the job artifacts.

[lol768]

https://dev.azure.com/xamarin/public/_build/results?buildId=127530&view=artifacts&pathAsName=false&type=publishedArtifacts

So there are native Linux binaries - great! - is it supposed to have produced a nuget artifact as well? I can't see that there is one