TV2DK-2493: Preserve CPC settings when navigating between views

[JeppeSigaard]

Related issue: https://github.com/as-ideas/oil/issues/256

Problem When navigating between default view and CPC view, the purpose settings will reset to advanced_settings_purposes_default from configuration, effectively reverting any user feedback. This may result in users experiencing unresponsive settings, where input does not propagate properly into the desired sections, which can potentially impact the end user's feeling of trust.

Solution Add a state-like, mutatable array, which will hold user input temporarily, while navigating between screens and store intended consent settings, regardless of on which screen the final consent is given.

Changes

• Added getPendingPurposes, setPendingPurposes, addPendingPurpose, removePendingPurpose and setPendingPurpose utility functions
• Implemented utility functions into privacy settings methods
• Implemented utility functions into CPC views
• Added unit tests for core_pending_purposes
• Added test for CPC rendering with pending purposes
• side effect: update package-lock from package

Examples Changes in this PR will propagate into all demos. A production version is implemented on https://tv2.dk

[JeppeSigaard]

Closing for tidying my open PR's, feel free to re-open if needed.