Add About page, include services in price updates, and add entity to commercial categories

[mapiolca]

Motivation

• Provide an "About" admin page for the DynamicsPrices module and localization strings for it.
• Ensure price update routines handle both products and services consistently when computing and updating selling prices.
• Make commercial categories multi-entity aware and migrate SQL/schema and module dictionaries to include an entity column.

Description

• Added a new admin page admin/about.php that renders module information and is wired into the admin tabs via lib/dynamicsprices.lib.php.
• Updated dictionary definitions in core/modules/modDynamicsPrices.class.php to include entity in tabsql, tabfieldvalue and tabfieldinsert for c_commercial_category.
• Removed the on-setup procedural migration checks from admin/setup.php and removed the old ensureCommercialCategoryColumns() helper and its call from modDynamicsPrices::init().
• Changed product-type checks across trigger and library code to accept both Product::TYPE_PRODUCT and Product::TYPE_SERVICE (replacing single-type checks with in_array(..., array(Product::TYPE_PRODUCT, Product::TYPE_SERVICE), true)) so services are included in update paths, and updated product selection SQL to use p.fk_product_type IN (0,1).
• Updated SQL schema and migration scripts: added entity column to c_commercial_category create statements and to dolibarr_allversions.sql insert statements so new rows include an entity value.
• Added and updated language strings in multiple langs/*/dynamicsprices.lang files to add LMDB_About* entries and clarify the Code_commercial_category label.

Testing

• Ran PHP syntax checks on modified PHP files with php -l and they passed without errors.
• Imported updated SQL files (sql/dolibarr_allversions.sql and sql/llx_c_commercial_category.sql) into a test database using mysql and the schema changes applied successfully.
• Verified the admin pages render by requesting the module admin routes in a test instance; the About tab appears and the settings page loads (automated smoke check via HTTP request assertions succeeded).

---

Codex Task