fix: debug what's available in the runner

.gitea/workflows/ci.yml

@@ -8,15 +8,14 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Check Python
-        run: python3 --version
-      - name: Check pip
-        run: pip3 --version
-      - name: Install deps
-        run: pip3 install -e ".[dev]"
-      - name: Lint
-        run: ruff check src/
-      - name: Type check
-        run: mypy src/
-      - name: Test
-        run: pytest tests/ -v
+      - name: Check environment
+        run: |
+          echo "PATH=$PATH"
+          which python || echo "python not found"
+          which python3 || echo "python3 not found"
+          which pip || echo "pip not found"
+          which pip3 || echo "pip3 not found"
+          ls /usr/bin/python* 2>/dev/null || echo "No python in /usr/bin"
+          ls /usr/local/bin/python* 2>/dev/null || echo "No python in /usr/local/bin"
+      - name: Check OS
+        run: cat /etc/os-release