[MarcusNebel]

This pull request introduces a new area selection and movement tool, as well as a draw tool, to the signal box GUI. These features allow users to select rectangular regions of the grid, move them interactively, and draw tiles more efficiently. The changes span the GUI, rendering, and network layers to support these new editing capabilities.

Area Selection and Movement Tool

• Added area selection and movement support in UISignalBoxRendering, including logic for starting, updating, and finishing area selections and moves, as well as visual feedback for selected and moved areas.

Draw Tool

• Added a draw tool to enable rapid tile editing by dragging the mouse, with logic to determine add/remove mode and prevent redundant toggles.
• Added draw tool toggle UI elements in the side panel, with visual highlighting and mode switching logic.

UI and Rendering Enhancements

• Added toggle buttons for switching between move and draw tools in the side panel, including tooltips and highlight updates.
• Enhanced rendering to visualize area selections and moves with colored rectangles and previews.

These changes significantly improve the usability and efficiency of the signal box editor by allowing bulk editing and more intuitive interactions.

[MrTroble]

Check compatibility with #277 and test @Uhutown

[MrTroble]

Thank you for your contribution. Sadly we are currently all working on other stuff so this could take a while. We have also done some big changes to the UI in a still (since fking 5 months) unmerged PR