[18.0][IMP] l10n_br_fiscal: add NBS criteria to tax definition

[marcelsavegnago]

This pull request introduces support for managing and searching NBS (Nomenclatura Brasileira de Serviços) codes in the fiscal tax definition module, similar to the existing NBM and CEST support. The changes include new fields, search logic, and UI updates to allow users to associate, search, and filter tax definitions by NBS codes.

NBS (Nomenclatura Brasileira de Serviços) support:

• Added new fields to l10n_br_fiscal.tax.definition and l10n_br_fiscal.nbs models to store and relate NBS codes (nbss, not_in_nbss, nbs_ids, and tax_definition_ids). [1] [2]
• Implemented the action_search_nbss method to allow searching and assigning NBS codes based on user input, similar to the existing NBM logic. This method is now triggered on create and write when the nbss field is updated. [1] [2] [3]

Domain and mapping logic enhancements:

• Updated the _get_search_domain and map_tax_definition methods to include NBS code logic, ensuring tax definitions can be filtered and mapped using NBS codes in addition to NBM and CEST. [1] [2] [3] [4] [5]

User interface improvements:

• Added a new "NBS" tab to the tax definition form view, allowing users to input, search, and view associated NBS codes in the UI.

[OCA-git-bot]

Hi @renatonlima, @rvalyi,
some modules you are maintaining are being modified, check this out!