New package: F-Sy-H-1.66

[cinerea0]

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

[itsdeadguy]

Just a heads up, the author of fast-syntax-highlighting has wiped everything from everywhere and gone AWOL.
more info can be found in this reddit thread about the whole situation

[cinerea0]

Thanks for the heads up, I'll be switching the upstream in the template to refer to one of the re-uploads.

[github-actions]

Pull Requests become stale 90 days after last activity and are closed 14 days after that. If this pull request is still relevant bump it or assign it.

[cinerea0]

I'm still working on this.

[cinerea0]

After some more investigation, it appears that installing this plugin system-wide results in subtle bugs that I don't know how to fix. As such, I am closing this PR.