refactor!: proof_of_sql_parser::intermediate_ast::UnaryOp with sqlparser::ast::UnaryOp in the proof-of-sql crate

[varshith257]

Please be sure to look over the pull request guidelines here: https://github.com/spaceandtimelabs/sxt-proof-of-sql/blob/main/CONTRIBUTING.md#submit-pr.

Please go through the following checklist

• The PR title and commit messages adhere to guidelines here: https://github.com/spaceandtimelabs/sxt-proof-of-sql/blob/main/CONTRIBUTING.md. In particular ! is used if and only if at least one breaking change has been introduced.
• I have run the ci check script with source scripts/run_ci_checks.sh.

Rationale for this change

This PR addresses the need to replace the proof_of_sql_parser::intermediate_ast::UnaryOp with the sqlparser::ast::UnaryOp in the proof-of-sql crate as part of a larger transition toward integrating the sqlparser .

This change is a subtask of issue #235, with the main goal of streamlining the repository by switching to the sqlparser crate and gradually replacing intermediary constructs like proof_of_sql_parser::intermediate_ast with sqlparser::ast.

What changes are included in this PR?

• All instances of proof_of_sql_parser::intermediate_ast::UnaryOp have been replaced with sqlparser::ast::UnaryOp
• Every usage of UnaryOp has been updated to maintain the original functionality, ensuring no changes to the logic or behavior.
• Any unsupported UnaryOp variants from sqlparser have been appropriately handled using existing error handling mechanisms (i.e., the Unsupported variant in ExpressionEvaluationError).

Are these changes tested?

Yes

Part of #235

[iajoiner]

@varshith257 Let's get #344 merged first so that your PR can be simpler. :)

[iajoiner]

Some minor issues. In general this is excellent! Please complete the PR description and fix these issues.

[github-actions]

🎉 This PR is included in version 0.43.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀