Add tasks for all the new languages

Task/Enforced-immutability/8th/enforced-immutability.8th

@@ -0,0 +1 @@
+123 const var, one-two-three

Task/Enforced-immutability/Nim/enforced-immutability.nim

@@ -0,0 +1,7 @@
+var x = "mutablefoo" # Mutable variable
+let y = "immutablefoo" # Immutable variable, at runtime
+const z = "constantfoo" # Immutable constant, at compile time
+
+x[0] = 'M'
+y[0] = 'I' # Compile error: 'y[0]' cannot be assigned to
+z[0] = 'C' # Compile error: 'z[0]' cannot be assigned to

Task/Enforced-immutability/Oforth/enforced-immutability.oforth

@@ -0,0 +1,12 @@
+Object Class new: MyClass(a, b)
+
+MyClass method: setA(value)  value := a ;
+MyClass method: setB(value)  value := b ;
+
+MyClass method: initialize(v, w)  self setA(v) self setB(w) ;
+
+MyClass new(1, 2)                // OK : An immutable object
+MyClass new(1, 2) setA(4)        // KO : An immutable object can't be updated after initialization
+MyClass new(ListBuffer new, 12)  // KO : Not an immutable value.
+ListBuffer new Constant new: T   // KO : A constant cannot be mutable.
+Channel new send(ListBuffer new) // KO : A mutable object can't be sent into a channel.

Task/Enforced-immutability/Phix/enforced-immutability.phix

@@ -0,0 +1,3 @@
+constant n = 1
+constant s = {1,2,3}
+constant str = "immutable string"

Task/Enforced-immutability/Sidef/enforced-immutability.sidef

@@ -0,0 +1,2 @@
+define PI = 3.14159;            # compile-time defined constant
+const MSG = "Hello world!";     # run-time defined constant

Task/Enforced-immutability/jq/enforced-immutability.jq

@@ -0,0 +1 @@
+["a", "b"] as $a | $a[0] = 1 as $b | $a