Adds a new repository with a local path in the form of <repository name>=<path>. This only takes effect with --enable_bzlmod and is equivalent to adding a corresponding `local_repository` to the root module's MODULE.bazel file via `use_repo_rule`. If the given path is an absolute path, it will be used as it is. If the given path is a relative path, it is relative to the current working directory. If the given path starts with '%workspace%', it is relative to the workspace root, which is the output of `bazel info workspace`. If the given path is empty, then remove any previous injections.