aider: Refactored cmd_run method to use shlex.split() instead of args.split() to correctly parse arguments, respecting quotes and other special characters.

# Context:
USER: is there a better way to parse args than args.split(), like a shell would, to respect quotes, etc
ASSISTANT: Yes, you can use the `shlex` module to split the arguments like a shell would, respecting quotes and other special characters. We will modify the `cmd_run` method in the `aider/commands.py` file to use `shlex.split()` instead of `args.split()`.

Here are the changes to `aider/commands.py`:

```python
aider/commands.py
<<<<<<< ORIGINAL
  3 import subprocess
=======
  3 import subprocess
  4 import shlex
>>>>>>> UPDATED
```

```python
aider/commands.py
<<<<<<< ORIGINAL
230         try:
231             result = subprocess.run(args.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
=======
230         try:
231             parsed_args = shlex.split(args)
232             result = subprocess.run(parsed_args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
>>>>>>> UPDATED
```

These changes import the `shlex` module and replace `args.split()` with `shlex.split(args)` in the `cmd_run` method. This will correctly parse the arguments, respecting quotes and other special characters.

aider/commands.py

@@ -1,6 +1,7 @@
   1 import os
   2 import git
   3 import subprocess
+  4 import shlex
 from rich.prompt import Confirm
 from prompt_toolkit.completion import Completion
 from aider import prompts
@@ -228,7 +229,8 @@ class Commands:
 228     def cmd_run(self, args):
 229         "Run the supplied command in a subprocess and combine stdout and stderr into a single string"
 230         try:
-231             result = subprocess.run(args.split(), stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+231             parsed_args = shlex.split(args)
+232             result = subprocess.run(parsed_args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
 232             combined_output = result.stdout + result.stderr
 233             print(combined_output)
 234         except Exception as e: