build: configurar herramientas de verificación OCA

- Instalar pre-commit con 25 hooks configurados
- Configurar black 26.1.0 para formateo de código Python
- Configurar isort 7.0.0 para ordenación de imports
- Configurar flake8 7.3.0 con flake8-bugbear
- Configurar pylint 3.1.1 con pylint-odoo 9.1.2
- Añadir autoflake y pyupgrade para mejoras automáticas
- Configurar prettier para formateo de XML/JSON/YAML
- Crear .editorconfig para consistencia de editor
- Crear Makefile con comandos útiles
- Crear check_addon.sh para verificación rápida de addons
- Actualizar configuración de VS Code con extensiones recomendadas
- Añadir documentación completa de uso
- Aplicar formateo automático a archivos existentes
- Deshabilitar setuptools-odoo (no soporta Odoo 18.0 aún)
- Deshabilitar fix-encoding-pragma (obsoleto, usar pyupgrade)

product_price_category/README.rst

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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl
+   :alt: License: AGPL-3
+
+======================
+Product Price Category
+======================
+
+This module adds a field Price Category on Product Template
+and allow Pricelist to be applied on this field.
+
+Usage
+=====
+
+In Pricelist Form (Sales -> Configuration -> Pricelist), you can add or modify
+an item ("Manage Pricelist Items" access should be checked in the user settings)
+and select "Price Category" in "Applied on".
+Then you have to choose on which price category should it be applied.
+
+.. image:: static/pricelist_price_category.png
+
+
+Product price category can be modified in product form -> General Information.
+
+.. image:: static/product_price_category.png
+
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.odoo-community.org/runbot/167/10.0
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/sale-workflow/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smash it by providing detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Odoo Community Association: `Icon <https://github.com/OCA/maintainer-tools/blob/master/template/module/static/description/icon.svg>`_.
+
+Contributors
+------------
+
+* Cyril Gaudin <cyril.gaudin@camptocamp.com>
+* Akim Juillerat <akim.juillerat@camptocamp.com>
+
+Do not contact contributors directly about support or help with technical issues.
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit https://odoo-community.org.