[Helix] Handling broken grammar in builds through recovery and scope

<!-- Your enhancement may already be reported! Please search on the issue tracker before creating a new issue. If this is an idea for a feature, please open an "Idea" Discussion instead. --> We have had some recent issues involving grammar failing to be fetched/build that then prevents helix from being able to build: #15419 #15405 . I think by default these should be logged, but recoverable and not block the compilation/install process. Naively, we can just continue through the grammar fetching/builds and then build up the errors and return to just log. We could also use this time to use `gix` itself for clones, instead of shellng out to the git client. I believe the `gix` repo include a clone example? In addition to this more fundamental change, there could also be a new config option that would enable the grammar the user wants built. This would lower disk space, something that has been brought up before, but just as a side effect. If we reduce the surface area of the grammars bei