As a first option, `publish_code_suggestions` will try to post all review comments in a single GitHub review. This is preferred because it will group all comments together in the GitHub UI under the same review, and will trigger just one notification for any viewers of the PR.
If just one of the comments is malformed, the entire API request will fail and none of the comments will be posted to the PR. In the current implementation, the fallback mechanism is to just post each comment separately with `try/except` and skip the invalid comments. This works, but potentially creates a lot of noise in the PR as each comment is posted as in a separate review, creating multiple notifications.
This suggested fallback is based on a similar idea, but without creating multiple review notifications. The it works is by iterating over the potential comments, and starting a PENDING review for the current comment. The review is not submitted and does not trigger a notification, but it is verified against the GitHub API, and so we can verify if the comment is valid. After checking all comments we then submit a single review with all the verified comments which is guaranteed to succeed.
The end result is having the exact same comments posted to the PR as with the current fallback method, but the downside is having twice as many API calls (for each comment we have 1 extra API call to delete the pending review).
All commands need the `ai_handler` argument. The PRConfig class was missing it in the `__init__` method and so it failed with this error:
```
File "/home/vcap/app/pr_agent/agent/pr_agent.py", line 76, in handle_request
await command2class[action](pr_url, ai_handler=self.ai_handler, args=args).run()
TypeError: PRConfig.__init__() got an unexpected keyword argument 'ai_handler'
```
- Update `create_inline_comment` method in various git providers to include `absolute_position` parameter
- Remove `create_inline_comment` method from providers that do not support inline comments
- Enhance `find_line_number_of_relevant_line_in_file` function to handle absolute position
- Modify `pr_code_suggestions.py` to handle improved code inclusion in suggestions
- Add `include_improved_code` configuration option in `configuration.toml` and update documentation accordingly
