Separate lint with flake8

.github/workflows/lint_check.yml

@@ -0,0 +1,19 @@
+name: Lint Check
+
+on: [pull_request, push, workflow_dispatch]
+
+jobs:
+  lint:
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+
+    - name: Install flake8
+      run: pip install flake8-pyproject
+
+    - name: Run flake8
+      run: flake8 neurodamus tests

.github/workflows/simulation_test.yml

@@ -237,10 +237,6 @@ jobs:
     - name: Install test dependencies
       run: |
         pip install -r tests/requirements.txt
-        pip install flake8 flake8-pyproject
-
-    - name: Run flake8
-      run: flake8 .
 
     - name: test-unit
       run: |