Sort tag or equivalent

Example file:
```
Version x.xx of xx/xx/xxxx
+ #removed: .....
+ #added: .....
+ #fixed: .....
```

Example of call (`devist init`):

```sh
$ devist --sort [changelog-file] 
# will sort changelog-file by tag priority (added, fixed, etc.)
# sorts refrence file
```

Reference translates to:
```
Version x.xx of xx/xx/xxxx
+ #added: .....
+ #fixed: .....
+ #removed: .....
```