feat(security): add --page-size and --page-number to rules list

[clementgbcn]

What does this PR do?

• Adds --page-size and --page-number flags to pup security rules list, wiring them into ListSecurityMonitoringRulesOptionalParams.
• Without pagination, the API silently caps results at 10 rules, making it impossible to retrieve more than the first page of a large ruleset.

No JIRA ticket — standalone usability fix.

The implementation follows the existing pattern used by pup users list and the internal backend_rules_list function in csm_threats.rs, both of which already use page_size/page_number on the same SDK type.

Will it impact other teams?

Only users of pup security rules list — no cross-team service impact.

Deploy plan

CLI binary only — no service deployments required.

Rollback plan

Revert the commit or pin to the previous pup binary version via Homebrew (brew switch pup <prev-version>).

Testing Guidelines

• Is this change retro-compatible? Yes — --page-size defaults to 10 (matching the API's implicit default) and --page-number to 0, so existing callers with no flags get identical behaviour.
• Tested in staging — CLI tool, not a service; verified locally that cargo check passes clean.
• Acceptable performance — no performance concern.

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