The `fix` sub-command built-in rules don't retain directive key aliases and use defaults

[Gedochao]

Version(s)
94a6e37 / 1.5.4

Describe the bug
When using the fix sub-command built-in rules to migrate using directives, directive key aliases are not retained.
i.e. //> using dep becomes //> using dependency.

To Reproduce
run

scala-cli fix . --power

on a Scala CLI project with

//> using dep com.lihaoyi::os-lib:0.9.3

the resulting project.scala will contain:

// Main
//> using dependency com.lihaoyi::os-lib:0.9.3

Expected behaviour
Directive key aliases should be retained.

Extra context

• raised on Discord: https://discord.com/channels/632150470000902164/901153021638082660/1327279669573320754