feat(Compliance): onboarding compliance frontend

[LightOfHeaven1994]

What are the changes introduced in this pull request?

Initial compliance-frontend onboarding by adding routes, placeholder page and permissions required.
inspired by the way how other apps have been onboarded step by step #999.

I also have this PR but it adds some tweaks that I'm not sure about yet (since we are still looking into the best way to integrate compliance into IoP)

Considerations taken when implementing this change?

What are the testing steps for this pull request?

Run foreman with foreman_rh_cloud, navigate to Insights, open nav menu and see that Compliance Reports and SCAP Policies entries are in place. If you select one of these - you will see This page is under development. Please check back soon for updates.

[sourcery-ai]

Hey - I've left some high level feedback:

• Consider making the placeholder text in InsightsCompliancePlaceholder translatable using the same i18n mechanism used elsewhere in the React frontend, so it can be localized like other UI strings.
• The naming for SCAP policies is a bit inconsistent (scappolicies in paths and route names); aligning this to a clearer, consistently formatted name (e.g., scap_policies or scapPolicies) across routes, menu keys, and component names would improve readability and maintainability.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider making the placeholder text in `InsightsCompliancePlaceholder` translatable using the same i18n mechanism used elsewhere in the React frontend, so it can be localized like other UI strings.
- The naming for SCAP policies is a bit inconsistent (`scappolicies` in paths and route names); aligning this to a clearer, consistently formatted name (e.g., `scap_policies` or `scapPolicies`) across routes, menu keys, and component names would improve readability and maintainability.

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[LightOfHeaven1994]

@vkrizan @nofaralfasi I believe it should be enough for showing some basics