Japanese Product Kana Name

This module adds a kana reading (pronunciation) field to product templates and product variants, and makes products searchable by that reading.

• On the product form, a kana name field appears right under the product name, with an example placeholder. Users type the reading in kana.
• The kana name is also available as an optional column in the product list view, so it can be shown or hidden.
• In the product search view, a dedicated "Name (Kana)" filter is added next to the normal name search.
• When the kana field is changed, it is automatically normalized (standardized) so that searches match consistently.
• Searching for products by name also searches the kana reading of the related product template, so a product written in kanji can be found by typing its kana pronunciation. This applies to product variants as well.

The module touches the product template and product variant models and their form, list and search views. It relies on the Japanese kana normalization module for the actual normalization logic.