Feature request: `-h` should override previous `--size`

The `-h` flag should not do nothing, but be equivalent to `--size default`.

The reason is that if an alias sets e.g. `--size bytes`, to emulate the default behavior of `ls`, an option to the alias invocation `-h` is naturally expected to override that.

```bash
ls # shows size in bytes
ls -h # shows size human-readable

alias ls='lsd --size bytes'
ls # shows size in bytes (= 'lsd --size bytes')
ls -h # should show size human-readable but doesn't (= 'lsd --size bytes -h')
````

- os: Debian GNU/Linux 12 'bookworm'
- `lsd --version`: 0.23.1

Start by locating the Rust option-parsing and size-formatting entry points for `-h` and `--size`. Reproduce the documented alias scenario with `--size bytes -h`, then verify that the completed change makes `-h` restore human-readable sizing without changing ordinary `--size` behavior.

Written by the indexing model from the issue text.