aider: Changed use_ctags to map_tokens parameter in main.py to pass to Coder class.

# Context:
USER: pass it to Coder as map_tokens instead of `use_ctags`
ASSISTANT: I will modify the `aider/main.py` file to pass `map_tokens` to the `Coder` class instead of `use_ctags`.

```python
aider/main.py
<<<<<<< ORIGINAL
    coder = Coder(
        io,
        main_model=args.model,
        fnames=args.files,
        pretty=args.pretty,
        show_diffs=args.show_diffs,
        auto_commits=args.auto_commits,
        dirty_commits=args.dirty_commits,
        dry_run=args.dry_run,
        use_ctags=args.ctags,
        verbose=args.verbose,
        openai_api_key=args.openai_api_key,
    )
=======
    coder = Coder(
        io,
        main_model=args.model,
        fnames=args.files,
        pretty=args.pretty,
        show_diffs=args.show_diffs,
        auto_commits=args.auto_commits,
        dirty_commits=args.dirty_commits,
        dry_run=args.dry_run,
        map_tokens=args.map_tokens,
        verbose=args.verbose,
        openai_api_key=args.openai_api_key,
    )
>>>>>>> UPDATED
```

Now, the `map_tokens` value is passed to the `Coder` class instead of `use_ctags`. Please make sure to update the `Coder` class in `aider/coder.py` to accept and use the `map_tokens` parameter.

aider/main.py

@@ -217,7 +217,7 @@ def main(args=None, input=None, output=None):
         auto_commits=args.auto_commits,
         dirty_commits=args.dirty_commits,
         dry_run=args.dry_run,
-        use_ctags=args.ctags,
+        map_tokens=args.map_tokens,
         verbose=args.verbose,
         openai_api_key=args.openai_api_key,
     )