Added kNearestNeighbour and refactored Vector to a package level above and added a constructor

test/machine_learning/perceptron/VectorTest.java

@@ -1,81 +0,0 @@
-package machine_learning.perceptron;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.List;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-class VectorTest
-{
-
-    @Test
-    void shouldInitializeZeroVector()
-    {
-        var v = new Vector(3);
-
-        var expected = new Vector(List.of(0d, 0d, 0d));
-
-        assertEquals(3, v.dimension());
-        assertEquals(expected, v);
-    }
-
-    @Test
-    void shouldReturnCorrectVectorWhenAdding()
-    {
-        var v1 = new Vector(List.of(1d, 2d));
-        var v2 = new Vector(List.of(3d, 4d));
-
-        var result = v1.add(v2);
-        var expected = new Vector(List.of(4d, 6d));
-
-        assertEquals(expected, result);
-    }
-
-    @Test
-    void shouldReturnCorrectVectorWhenSubtracting()
-    {
-        var v1 = new Vector(List.of(1d, 2d));
-        var v2 = new Vector(List.of(3d, 4d));
-
-        var result = v1.subtract(v2);
-        var expected = new Vector(List.of(-2d, -2d));
-
-        assertEquals(expected, result);
-    }
-
-    @Test
-    void shouldReturnCorrectVectorWhenScalarMultiplying()
-    {
-        var v1 = new Vector(List.of(1d, 2d));
-        var v2 = new Vector(List.of(3d, 4d));
-
-        var result = v1.scalar(v2);
-        var expected = 11d;
-
-        assertEquals(expected, result);
-    }
-
-    @Test
-    void shouldReturnCorrectVectorWhenEuclid()
-    {
-        var v1 = new Vector(List.of(1d, 2d));
-
-        var result = v1.euclid();
-        var expected = Math.sqrt(5);
-
-        assertEquals(expected, result);
-    }
-
-    @Test
-    void shouldReturnCorrectVectorWhenDividing()
-    {
-        var v1 = new Vector(List.of(1d, 2d));
-        var div = 2d;
-
-        var result = v1.divide(div);
-        var expected = new Vector(List.of(0.5d, 1d));
-
-        assertEquals(expected, result);
-    }
-}