Add SetBit to bitmanipulation (#4348)

src/main/java/com/thealgorithms/bitmanipulation/SetBit.java

@@ -0,0 +1,10 @@
+package com.thealgorithms.bitmanipulation;
+/**
+ * Sets a specific bit to 1
+ */
+
+public class SetBit {
+    public static int setBit(int num, int bit) {
+        return num | (1 << bit);
+    }
+}

src/test/java/com/thealgorithms/bitmanipulation/SetBit.java

@@ -0,0 +1,13 @@
+package com.thealgorithms.bitmanipulation;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+class SetBitTest {
+    @Test
+    void testSetBit() {
+        assertEquals(5, SetBit.setBit(4, 0));
+        assertEquals(3, SetBit.setBit(3, 1));
+    }
+}