This is a language package for the Zed code editor that adds support for the OpenEdge ABL language.
Currently it's experimental and only provides syntax highlighting, the underlying grammar is noweher near complete so don't expect it to work perfectly.
It is probably not going to be submitted to the Zed extension repository, so you have to install it manually, to install simply clone the repository and use Install Dev Extension feature in Zed. Be patient, it might take a while to compile the grammar.