Add row col based get to Grid2D.kt

Author: mjl757

src/main/kotlin/com/soberg/aoc/utlities/datastructures/Grid2D.kt

@@ -21,6 +21,8 @@ data class Grid2D<T>(
 
     infix operator fun get(location: Location): T = grid[location.row][location.col]
 
+    fun get(row: Int, col: Int): T = grid[row][col]
+
     /** @return true if the specified [location] is in the bounds of this grid, false if not. */
     fun isInBounds(location: Location): Boolean = isInBounds(location.row, location.col)
 
@@ -92,4 +94,4 @@ data class Grid2D<T>(
     }
 }
 
-fun <T> List<List<T>>.toGrid2D() = Grid2D(this)
+fun <T> List<List<T>>.toGrid2D() = Grid2D(this)