feat: Add support for scanning specific rules

[gabriellavengeo]

Add support for only running scans for specific rules instead of the entire ruleset. This is helpful if one wants to do some specific checks without having to filter the scan result afterwards (e.g. only check seccomp).

• Added --rules/-r flag to CLI which takes a comma-separated list of rule IDs
• Added support for a rule query parameter in the HTTP server mode (supports multiple, e.g. ?rule=foo&rule=bar)

All Submissions.

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Code Submissions.

• Does your submission pass linting, tests, and security analysis?

Changes to Core Features.

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?

[copethomas]

LGTM

[copethomas]

LGTM