Count and print sloc count in tools workflow

.github/workflows/tools.yml

@@ -46,3 +46,14 @@ jobs:
         echo -e "t,x,y,z\n0,1,2,3\n1,4,5,6" > log.csv
         ./csv_to_mcap.py log.csv
         test $(stat -c %s log.mcap) -eq 883
+  sloc:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - run: sudo apt-get install -y cloc jq
+    - name: Print source lines of code
+      run: cloc --by-file-by-lang flix
+    - name: Annotate total source lines
+      run: |
+        sloc=$(cloc flix --json | jq -r '.SUM.code')
+        echo "::notice title=SLOC::Current SLOC = $sloc"