fix: Correct arraycopy source and destination in dropRow method (#…

…130)

This change addresses an issue in the `Matrix` class where the `System.arraycopy` method was used incorrectly in the `dropRow` method. Specifically, the source and destination parameters in `System.arraycopy` were swapped, which led to improper handling of row removal from the matrix.

Signed-off-by: Ryuu Mitsuki <[email protected]>

src/main/java/com/mitsuki/jmatrix/Matrix.java

@@ -1279,7 +1279,7 @@ public static Matrix dropRow(Matrix m, int row) {
         double[][] newEntries = new double[rows - 1][cols];
         for (int i = 0, destRow = 0; i < rows; i++) {
             if (i == row) continue;  // Skip the desired row index
-            System.arraycopy(newEntries[destRow++], 0, entries[i], 0, cols);
+            System.arraycopy(entries[i], 0, newEntries[destRow++], 0, cols);
         }
 
         return new Matrix(newEntries);