build(fpb-lint): linting errors as PR comments (#10618)

Co-authored-by: ImVector <59611597+LuigiImVector@users.noreply.github.com>
Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

.github/workflows/fpb-lint.yml

@@ -1,6 +1,6 @@
 name: free-programming-books-lint
 
-on: [push, pull_request]
+on: [pull_request]
 
 permissions:
   contents: read
@@ -17,7 +17,20 @@ jobs:
       with:
         node-version: '16.x'
     - run: npm install -g free-programming-books-lint
-    - run: fpb-lint ./books/
-    - run: fpb-lint ./casts/
-    - run: fpb-lint ./courses/
-    - run: fpb-lint ./more/
+
+    - name: Pull Request
+      run: |
+        fpb-lint books casts courses more &> output.log
+
+    - name: Clean output and create artifacts
+      if: always()
+      run: |
+          mkdir -p ./pr
+          echo ${{ github.event.pull_request.html_url }} > ./pr/PRurl
+          cat output.log | sed -E 's:/home/runner/work/free-programming-books/|⚠.+::' | uniq > ./pr/error.log
+
+    - uses: actions/upload-artifact@v3
+      if: always()
+      with:
+        name: pr
+        path: pr/