Function update_grid_state 

pub fn update_grid_state(
    grid_state: &mut GridState,
    selected_cell_reference: usize,
    selection_coordinates: [i32; 2],
    system_offset: [i32; 2],
    visualization: &mut Option<VisualizationCapture>,
    iteration: usize,
)

Mark the selected tile position as locked and update adjacency weights

Adjacency weights decrease with distance to guide future tile selection toward positions near already-placed tiles