fix(generators): run UI tests, guard optional bus, harden e2e clones

Three generator fixes:
- templates/feature/vitest.config.ts.hbs lacked an include for
  .test.{ts,tsx}; the node base only includes .test.ts, so scaffolded
  UI component tests never executed
- gen event consume emitted an unguarded bus.subscribe although
  ctx.bus is optional in BindContext — now wrapped in if (bus) {}
- e2e repo clones now exclude /dist and /.next build outputs, and
  every dep-stripping e2e strips the scaffolded package from EVERY
  workspace package.json via globSync instead of a hardcoded dependent
  list that drifts as packages gain or drop the dependency

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

turbo/generators/__tests__/feature.e2e.test.ts

@@ -38,7 +38,11 @@ describe("e2e: feature generator composition", () => {
         filter: (src) =>
           !src.includes("node_modules") &&
           !src.includes(".turbo") &&
-          !src.includes(".pnpm-store"),
+          !src.includes(".pnpm-store") &&
+          // Build outputs are large and irrelevant to the scaffold — cloning
+          // dist/.next fills the tmp dir and slows every e2e run.
+          !src.includes("/dist") &&
+          !src.includes("/.next"),
       });
 
       execSync(`cd ${tmp} && pnpm install --frozen-lockfile=false`, {