feat: add summary of errors and warnings

.gitlab-ci.yml

@@ -15,6 +15,11 @@ pylint:
   - grep 'Your code has been rated' pylint.log
   - rating=$(grep 'Your code has been rated' pylint.log | grep -Eo '[0-9]+(\.[0-9]+)?' | head -1)
   - awk -v "r=${rating}" -v "min_r=${MIN_PYLINT_RATING}" 'BEGIN{ if(r<min_r){exit(126)} }'
+  after_script:
+  - echo "Code errors:"
+  - grep -E 'E[0-9]{2,}:' pylint.log || true
+  - echo "Code warnings:"
+  - grep -E 'W[0-9]{2,}:' pylint.log || true
   artifacts:
     expire_in: 1 mo
     when: always