Add new subtables control and replace legacy notes UI

[jordicompanym]

This PR replaces the legacy notes UI with a subtable-based notes control (create/view/edit) and adds inline note editing/search/highlight in form screens.

What changed

• Added a new reusable frontend module for notes subtable behavior.
• Updated backend notes handling to decode subtable payloads and support add/update/delete note operations.
• Migrated notes XML from old hidden/textarea flow to the new subtable schema.
• Wired notes initialization into apps that already had notes enabled.
• Updated i18n messages (EN/ES/CA) for new notes/subtable labels.

Validation

• Ran targeted backend/frontend tests for notes/actions/common flow.
• Manually validated create/edit/delete/search behavior in affected apps.

[josepsanzcamp]

Thanks for the PR, I appreciate the contribution.

I’ll take some time to review it in detail and see how it could fit into the project.

At the moment I’m working on separating widgets behind a clearer specification so they can be added and registered without touching multiple global files. The goal is to make it easier to extend the system and add new components in a more straightforward way.

Once I finish that part I’ll look at how your proposal could be integrated with that approach.

If you have any questions in the meantime, feel free to ask.