Add test to verify GitHub Pages has EnforceHttps enabled

[MariusStorhaug]

Context

GitHub Pages supports enforcing HTTPS on custom domains and default *.github.io URLs via the EnforceHttps setting. Repositories using Process-PSModule should have this enabled for security.

Request

A test should verify that GitHub Pages is configured with EnforceHttps enabled on the repository.

Acceptance criteria

• The test checks the repository's Pages configuration for EnforceHttps
• A repository without HTTPS enforcement is flagged as a test failure or warning
• The test runs as part of the standard test suite

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Technical decisions

To be determined during implementation planning — uses the GitHub Pages API.

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Implementation plan

• Identify the appropriate test location (Test-PSModule or repo configuration tests)
• Use the GitHub Pages API to retrieve the https_enforced setting
• Assert that HTTPS enforcement is enabled
• Handle cases where Pages is not configured on the repository

[MariusStorhaug]

Restructured issue description into the standard three-section format.

• Rewrote from a one-line description into a proper context/request structure
• Updated title to imperative mood (removed emoji prefix)
• Added acceptance criteria and link to GitHub Pages API
• Created implementation plan with 4 tasks
• Applied Patch label