Added warp jump support for inter-system travel. The travelToLocationMachine now handles warp jumps when the destination is in a different system. Updated fuel calculations to account for warp fuel costs.

Significantly improved the pathfinding system. Added comprehensive tests with 800+ lines of test data covering various routing scenarios. The graph module now properly handles multi-system navigation and calculates optimal paths considering both regular travel and warp jumps.

Enhanced probe assignments to show the target location in the UI. Various display improvements including updated fusion reactors icon and better location information display.

Removed redundant system code and added debug helpers for troubleshooting pathfinding issues.