refactor

[ravilushqa]

Description

Refactored the code to use a new package for generating pull request descriptions. Added a function to generate completion messages for pull requests based on the changes made. This pull request also adds two new embedded prompts, PromptDescribeChanges and PromptDescribeOverall, to the code.

Changes

cmd/description/main.go

• Removed genCompletionOnce and genCompletionPerFile functions and replaced with a single call to description.GenerateCompletion.
• Removed Test flag.

description/description.go

• Added a function to generate completion messages for pull requests based on the changes made.
• The function calculates the sum of diffs in the pull request and generates a completion message either for the entire pull request or for each file in the pull request, depending on the size of the diffs.
• The function takes in a context, an OpenAI client, a GitHub commits comparison, and a GitHub pull request, and returns a completion message and an error.

openai/openai.go

• Added two new embedded prompts, PromptDescribeChanges and PromptDescribeOverall, to the code.
• The previous prompt PromptReview remains unchanged.

openai/prompts/describe_changes

• Addressed the issue of [insert issue here].
• Made changes including [insert changes made here].
• Changes have been tested and have successfully resolved the issue.

openai/prompts/describe_overall

• This pull request includes changes generated by AI to improve the codebase and enhance its functionality.
• The following changes have been made in this pull request:
  • [Insert changes here based on the actual code patch]