Introduces a Vendor entity and integrates vendor selection into the one-time order creation and order editing flows. Vendor-specific rates are now displayed and used for position roles, and UI components have been updated to allow users to select a vendor and see corresponding rates. Mock vendor data is used for demonstration purposes.
Introduces new domain entities for order types and one-time orders, along with their positions. Adds a mock OrderRepository to the data_connect package and wires it into the module. Updates localization files for new order flows and refactors Equatable usage for consistency. Also adds a minus icon to the design system.
Relocated all app directories (client, design_system_viewer, staff) and their contents under the new 'apps/mobile' path. This change improves project organization and prepares for future platform-specific structuring.
