RPG Auction House

Changed

- **Database Migration**: Migrated the internal auction house database backend from H2 to SQLite to prevent environment classloading crashes.

- **SQL Updates**: Converted category assignments, listing registers, bids, transactions, and inbox messages schemas to SQLite-compatible definitions, adapting auto-increment IDs and upsert queries.

### Added

- **Custom Quantity Buy Order Fulfillment**: Enhanced the Confirm Fulfill overlay with a quantity input box, letting players fulfill partial quantities of wanted buy orders. Appended the quantity to the C2S network packet and database transactions.

- **Listing Fee Scaling**: Integrated the new `listingFeePerHour` config option, dynamically calculating listing and auction fees on the server.

- **Advanced Search Integration**: Hooked `SearchUtils` tokenized filters into active listing and auction browse filters.

### Fixed

- **Category Dropdown Fix**: Repaired the Category Dropdown menu rendering and bounds clicking to prevent background list clicks, and themed it with active theme styling.

- **Themed User Interface**: Integrated the client-side active theme color configurations. Replaced hardcoded grey/black text colors inside purchase modals, order listings, bid setups, and side currency panels with theme dynamic properties (textColor, textInactiveColor) to guarantee text readability in dark modes.