use hint_tool instead of check-orphans script

.github/workflows/check.yml

@@ -31,7 +31,7 @@ jobs:
       - name: "Install cairo-lang"
         run: |
           # We need to pin the version of sympy, 1.13.0 is incompatible with cairo-lang
-          pip install cairo-lang==0.13.2 "sympy<1.13.0"
+          pip install cairo-lang==0.13.3 "sympy<1.13.0"
       - name: "Prepare test environment"
         run: |
           mkdir -p build
@@ -53,7 +53,7 @@ jobs:
       - name: "Install cairo-lang"
         run: |
           # We need to pin the version of sympy, 1.13.0 is incompatible with cairo-lang
-          pip install cairo-lang==0.13.2 "sympy<1.13.0"
+          pip install cairo-lang==0.13.3 "sympy<1.13.0"
       - name: "Prepare test environment"
         run: |
           bash ./setup-scripts/reset-tests.sh
@@ -89,10 +89,16 @@ jobs:
   orphans:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - run: rustup show
-      - run: rustup component add rustfmt
-      - uses: Swatinem/rust-cache@v2
-      - run: git submodule update --init
-      - run: ./scripts/check-orphans.sh
-
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Check orphaned hints
+        run: |
+          echo "Current directory: $(pwd)"
+          echo "List of files:"
+          ls -R
+          RESULT=$(cargo run --release -p hint_tool -- --subset orphaned | grep -oP '\d+$')
+          # Only 1 orphan allow (breakpoint hint)
+          if [ "$RESULT" -gt 1 ]; then
+              echo "Error: more than 1 orphaned hints found."
+              exit 1
+          fi