Migrate Current Store Service to Signal Store

[oidacra]

Parent Issue

#30012

Task

Migrate the current store service to Signal Store, maintaining all existing functionalities while preparing for future flexibility and considering component states.

Proposed Objective

Technical User Experience

Proposed Priority

Priority 2 - Important

Acceptance Criteria

1. Implement Signal Store to replace the current store service
2. Migrate all existing functionalities from the current store to Signal Store
3. Ensure all components currently using the store are updated to use Signal Store
4. Implement state management for component-level states using Signal Store
5. Design the Signal Store structure to be flexible for future additions and modifications
6. Add unit tests to cover all Signal Store functionalities

[oidacra]

QA Notes:

Objective

Verify functionality after migrating to Signal Store. This is just for the new Edit Contentlet

Tests

Create content

• Create new content in a ContentType
• Verify it saves correctly

View content

• Open existing content
• Check that all information is displayed

Edit content

• Modify existing content
• Save changes and verify they are applied correctly

Success criteria

• All functions work without errors
• No existing functionality is lost

[dsilvam]

Passed IQA: All test cases from the comment working.

Categories are not able to be saved but it is not related to this and was captured on a different card #30204

[josemejias11]

Approved: Tested on trunk_e0e83bd, Docker, macOS 14.5, FF v126.0.1