sanitize entire response before parsing comments

[harjotgill]

Summary by CodeRabbit

### Bug Fixes:
- Fixed a logic error in the `add` function in `prompts.ts`. The operation has been corrected from subtraction to addition.
- Enhanced security in `review.ts` by sanitizing the entire response before parsing comments. 

### Refactor:
- Renamed `sanitizeComment` function to `sanitizeResponse` in `review.ts`, and expanded its functionality to sanitize code blocks for suggestions and diffs.

### Removed:
- Removed single line comment functionality as it was deemed unnecessary.

🎉 Here's to bugs that are no more,
To logic errors shown the door.
With sanitized responses, we stand tall,
In the face of threats, big or small.
So here's to code that's clean and neat,
Making our victory oh so sweet! 🥳

[github-actions[bot]]

CodeRabbit

Walkthrough: This update corrects a logic error in the add function and enhances security by sanitizing the entire response before parsing comments. The changes ensure accurate arithmetic operations and safer handling of responses, improving both functionality and security.

Changes:

Files	Summary
src/prompts.ts	Fixed a syntax error in the add function, changing z = x - y to z = x + y for correct addition operation.
src/review.ts	Enhanced security by sanitizing the entire response before parsing comments. Renamed sanitizeComment to sanitizeResponse and updated its functionality to sanitize code blocks for suggestions and diffs. Removed single line comment functionality.