Add tasks for all the new languages

Task/Loops-For/Sidef/loops-for-1.sidef

@@ -0,0 +1,6 @@
+for (var i = 1; i <= 5; i++) {
+    for (var j = 1; j <= i; j++) {
+        print '*'
+    }
+    print "\n"
+}

Task/Loops-For/Sidef/loops-for-2.sidef

@@ -0,0 +1,4 @@
+for (1..5) { |i|
+    for (1..i) { print '*' }
+    print "\n"
+}

Task/Loops-For/Sidef/loops-for-3.sidef

@@ -0,0 +1,4 @@
+for i in (1..5) {
+    for j in (1..i) { print '*' }
+    print "\n"
+}

Task/Loops-For/Sidef/loops-for-4.sidef

@@ -0,0 +1,4 @@
+5.times { |i|
+    i.times { print '*' }
+    print "\n"
+}