ci(fix): fix linting configuration to exclude virtual environments

- Add .flake8 configuration
- Update CI workflow to exclude .venv from checks
- Add exclusion patterns to Black and isort configurations

Author: jonathan-irvin

.flake8

@@ -0,0 +1,8 @@
+[flake8]
+exclude = .git,__pycache__,build,dist,.venv,venv
+max-line-length = 88
+max-complexity = 10
+ignore = E203, W503  # These conflict with black
+per-file-ignores =
+    # imported but unused in __init__ files
+    __init__.py: F401

.github/workflows/ci.yml

@@ -40,14 +40,14 @@ jobs:
 
     - name: Lint with flake8
       run: |
-        poetry run flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        poetry run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=88 --statistics
+        poetry run flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --exclude=.venv,.git,__pycache__,build,dist
+        poetry run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=88 --statistics --exclude=.venv,.git,__pycache__,build,dist
     
     - name: Format check with black
-      run: poetry run black --check .
+      run: poetry run black --check --exclude=\.venv .
 
     - name: Import sorting check with isort
-      run: poetry run isort --check .
+      run: poetry run isort --check --skip .venv .
 
     - name: Test with pytest
       run: poetry run pytest --cov=src

pyproject.toml

@@ -49,7 +49,17 @@ major_on_zero = false
 line-length = 88
 target-version = ["py312"]
 include = '\.pyi?$'
+exclude = '''
+/(
+    \.git
+  | \.venv
+  | __pycache__
+  | build
+  | dist
+)/
+'''
 
 [tool.isort]
 profile = "black"
-line_length = 88
+line_length = 88
+skip = [".venv", ".git", "__pycache__", "build", "dist"]