chore: Add lean version of check_file_import

.github/workflows/build.yml

@@ -24,12 +24,7 @@ jobs:
         run: |
           lean --version
           lake --version
-      
-      - name: check ls 
-        run: |
-          ls -a
-          
-      
+
       - name: build cache
         run: |
           lake exe cache get
@@ -41,7 +36,14 @@ jobs:
           linters: gcc
           run: |
             bash -o pipefail -c "env LEAN_ABORT_ON_PANIC=1 lake build -KCI | tee stdout.log"
-      
+
+      - name: check file imports 
+        id : check_file_imports 
+        uses: liskin/gh-problem-matcher-wrap@v3
+        with : 
+          linters : gcc 
+          run : env LEAN_ABORT_ON_PANIC=1 lake exe check_file_imports
+
       - name: lint HepLean
         if: ${{ always() && steps.build.outcome == 'success' || steps.build.outcome == 'failure' }}
         id: lint