Add "string" command

src/execute.rs

@@ -70,6 +70,7 @@ pub fn execute(stack: &mut Stack, mut origin_stack: Option<&mut Stack>, mod_name
             "dup" => instructions::stack_manage::dup(&mut stack.memory),
             "swap" => instructions::stack_manage::swap(&mut stack.memory),
             "pick" => instructions::stack_manage::pick(&mut stack.memory, instruction.data),
+            "string" => instructions::stack_manage::string(&mut stack.memory, instruction.arg.clone()),
 
             // Math operations
             "add" => instructions::math::add(&mut stack.memory),

src/instructions/stack_manage.rs

@@ -34,3 +34,11 @@ pub fn pick(memory: &mut StackVec, data: u16) {
             .expect(&format!("{}", RunError::PickOutOfBounds)),
     );
 }
+
+pub fn string(memory: &mut StackVec, arg: String) {
+    for i in arg.chars() {
+        memory.push(i as u16);
+    }
+
+    memory.push(arg.len() as u16);
+}