ci: add eslint lint matrix to js-tests.yml

Add a 'lint' job to the JS tests workflow that runs 'eslint --fix'
across all discovered npm workspaces (same matrix as the check job).
Fixable issues auto-correct and don't block; eslint exits non-zero
only when un-fixable errors remain.

Also fix duplicate 'needs: workspaces' in the check job.

.github/workflows/js-tests.yml

@@ -30,8 +30,8 @@ jobs:
 
   check:
     name: Typecheck & Test
-    runs-on: ubuntu-latest
     needs: workspaces
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         package: ${{ fromJson(needs.workspaces.outputs.packages) }}
@@ -47,3 +47,4 @@ jobs:
           # --ignore-scripts: TS & tests don't need native deps
           command: npm ci --ignore-scripts
       - run: npm run --prefix ${{ matrix.package }} check
+      - run: npm run --prefix ${{ matrix.package }} fix