Sale Channel Search Engine Test/Demo module

This is a demonstration/test module. It does not add new screens or business rules; instead, when installed it loads example records so you can try out the sale channel search engine features.

What it creates: - A demo search engine backend named "Demo Sale Channel Elastic" pointing to an Elasticsearch server. - A demo sale channel named "Sale Channel with Elastic" linked to that backend. - Two export templates: "Test Product Export" for product.product (id and name) and "Test Category Export" for product.category (id and name). - Index configurations for products and categories, including sorting rules. - Four search indexes: products in French and English, and categories in French and English, all using the export templates above.

Because it depends on the sale channel search engine modules for categories and products, installing it also pulls in those modules. The data is meant for testing and demonstration only, so it should not be used in a live database. No menus, buttons, reports, scheduled jobs or automatic checks are defined by this module itself.