✨ Flag to reuse the last active window

## Proposed Addition

| Argument | Description |
| :- | :- |
|`-r` or `--reuse-window` | Use the last active window. |

## Description

When opening a file, tell CodeEdit to open the file in the last active window instead of opening the file in a new window (default behavior).

## Examples

```
codeedit Example.swift:43:10 --reuse-window
```

```
codeedit Example.swift:43:10 -r
```