[suggest]hard to show exact bytes size, let's make use of -h

[shejingui]

• lsd --version: 1.2.0

Actual behavior

By default, it shows human-readable sizes.
To display the exact size in bytes, we have to add an extra option "--size bytes", which is not very convenient. beginners have to consult the help command to find the option.

Expected behavior

By default, it shows sizes in bytes.
Human-readable sizes should be shown when -h is specified.

Benefits

This reduces the number of keystrokes needed to switch between the two display formats,
also it keeps the behavior consistent with the classic "ls" command, more easy to switch to "lsd".

[Slavetomints]

-h might be confused as a help command, as most programs use either --help or -h (or both in some cases). Maybe you want to find another flag to avoid confusion.