Fix package installation for yarn, add support for bun.lock

[shimizu-izumi]

I added a new private function between getPackageManager and installDependency to get the installation command based on the package manager.

I made 4 blank next.js shadcn/ui projects to test it, one for each package manager and install and dev install work for all package managers now.

The install command is hardcoded to i in the current version which only works for NPM according to documentations of the package managers.

[WarningImHack3r]

Thanks for your contribution!
I did hardcode i as it's supposed to work with all package managers despite not being listed in some of them's docs. However I just tried with yarn (the only one I never used), which I never did before, and it's indeed not supported, sorry!

[shimizu-izumi]

I tried adding the requested changes by trying a few things but I don't know enough about the codebase and Kotlin to do it.

[WarningImHack3r]

Alright no problem, I’ll take it from here, thank you very much for your time and investigation!