feat(gradle): link and unlink independent Gradle builds (#1413)

Opening a folder of independent Gradle builds selected only the first build. Link Gradle Projects… (pick a build's settings or build file) and Unlink on a build's root let an ordinary project window manage several independent builds without changing their scripts. The build model holds a list of Gradle builds; each keeps its own wrapper, working directory, environment, task routing and sync cache, keyed by the owning build directory. The links persist in the project's Gradle settings (linkedProjects); unlinking leaves files and saved run configurations alone. Existing includeBuild support is unchanged, and an explicitly linked build takes precedence over a composite that also includes it. Workspace windows keep Link/Unlink disabled.

Co-authored-by: gudcks0305 <[email protected]>

src/features/run/contextRun.ts

@@ -50,7 +50,8 @@ async function ensureConfigs() {
 export function projectContentRoots(): string[] {
   const own = validateProjectStructure(useProject.getState().settings?.projectStructure).contentRoots;
   // The build model keeps the folders of modules outside the project absolute.
-  const gradle = (useBuildModel.getState().model?.gradle?.projects ?? [])
+  const gradle = (useBuildModel.getState().model?.gradle ?? [])
+    .flatMap((g) => g.projects)
     .map((p) => p.dir)
     .filter((d) => isAbsolute(d));
   return [...new Set([...own, ...gradle])];