refactor(review): remove rating model use weighted random instead

[fabienzucchet]

Fixes #32

[github-actions]

LOGAF Level 2 - /home/runner/work/code-review-gpt/code-review-gpt/src/review/llm/feedbackProcessor.ts

1. The collectAndLogFeedback function is a bit redundant. It's essentially just awaiting a promise and returning the result. This could be done directly where the function is called.

2. The pickBestFeedbacks function could be simplified. Instead of using a priority queue, you could simply sort the feedbacks by logafScore and slice the first limit items.

Example:

const pickBestFeedbacks = async (feedbacks: IFeedback[], limit: number): Promise<IFeedback[]> => {
  return feedbacks.sort((a, b) => a.logafScore - b.logafScore).slice(0, limit);
};

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[mattzcarey]

LGTM 👍