<!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.--> ### Proposal The [Izuna](https://github.com/matsumonkie/izuna) system is an excellent example of a way to provide an enormous amount of value to the display of code. It would be excellent if GitLab supported such systems. A basic approach might be: - add a concept of code annotation integrations (under ~"group::ecosystem" ), adding custom providers there as configuration on a per-project basis - when displaying code (under ~"group::source code"), send the locations of lexed identifiers to the configured server to receive annotations.