aider: Added --show-source argument to flake8 hook in .pre-commit-config.yaml.

# Context:
USER: can we make flake8 output the actual lines that have each error?
ASSISTANT: Yes, we can modify the `.pre-commit-config.yaml` file to include the `--show-source` argument for flake8. This will show the source code lines that have errors.

Here's the change:

```yaml
.pre-commit-config.yaml
<<<<<<< ORIGINAL
  - repo: https://github.com/pycqa/flake8
    rev: 6.0.0
    hooks:
      - id: flake8
=======
  - repo: https://github.com/pycqa/flake8
    rev: 6.0.0
    hooks:
      - id: flake8
        args: ["--show-source"]
>>>>>>> UPDATED
```

.pre-commit-config.yaml

@@ -8,3 +8,4 @@ repos:
     rev: 6.0.0
     hooks:
       - id: flake8
+        args: ["--show-source"]