An intermediate between //stack and //move

### The Problem

A visual demonstration is probably the easiest:

### **The starting position:**

### **The ideal result:**

### **The current closest alternatives:**
`//move:`
`//stack:`

### A Solution

It's possible to estimate this result by using three commands:
```
//copy
/tp @s ^ ^ ^1 (move one forwards)
//paste
```
but then you have the issue where offsets bigger than 1 block mean your facing direction needs to be very exact

Alternatives:
- a flag for //move that makes the command "copy and paste" rather than the current "cut and paste"
- a flag for //stack that allows it to overwrite the selection
- a new command, e.g. //extend, //offset, whatever

### Alternatives

_No response_

### Anything Else?

_No response_