Add option to order vulnerabilities by id, title or risk_rating

[elyousfi5]

PR Description

Purpose: This pull request adds functionality to allow users to order vulnerabilities by id, title, or risk_rating when listing vulnerabilities for a specific scan. This enhancement improves the usability of the vulnerability listing feature by providing more flexibility in how the results are presented.

Changes Made:

• Introduced a new order_by parameter in the list_vulnz method, with a default value of risk_rating.
• Implemented sorting logic to handle three ordering options: id, title, and risk_rating.
• Updated the query to dynamically sort vulnerabilities based on the specified order_by parameter.
• Ensured that if an invalid order_by value is provided, the method defaults to sorting by risk_rating.

Benefits:

• Enhances the user experience by allowing more control over the presentation of vulnerability data.
• Enables users to easily find vulnerabilities based on their preferred sorting criteria, facilitating quicker analysis and decision-making.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.77778% with 1 line in your changes missing coverage. Please review.

Project coverage is 62.84%. Comparing base (038cf19) to head (a28a277). Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ostorlab/cli/vulnz/list/list.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #809 +/- ## ========================================== + Coverage 62.74% 62.84% +0.10% ========================================== Files 340 340 Lines 14229 14271 +42 ========================================== + Hits 8928 8969 +41 - Misses 5301 5302 +1 ```

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