Go to Implementation on a type or method declared in a dependency listed only the project's implementations once the project had one. openidea.java.implementations (java-usages 1.5.0) now answers {locations, complete}, complete when the type is declared in the sources, and also searches the Kotlin bridge's classes. When not complete, the chooser opens with the project's implementations (searching…) through the new lsp_goto_implementation channel and fills in the dependencies' when the standard request ends; closing it cancels the search.
JDT LS answers textDocument/implementation by building the type hierarchy over every dependency jar, so Go to Implementation and the implemented/overridden gutter markers were slow in projects with many dependencies. The app-owned JDT LS bundle (1.4.0) adds openidea.java.implementations: subtypes, or overriding methods with type arguments substituted and abstract ones left out, within the workspace's source folders only. ide-lsp asks it first and falls back to the standard request when the sources have none or the command is missing.
java-usages, kotlin-bridge and the patched Lombok agent are JDT LS bundles and a Java agent embedded into the app, not OpenIDEA plugins. Move them to java/ so plugins/ holds only plugins, and update the paths that embed or mention them.
Also fix the stale build path in the hello fixture and the contributor guide's layout (there is no templates/ directory; starter templates live in the openidea-plugin CLI).