[Plugin] adding starship

[Heus-Sueh]

close my own issue: #627

I believe I didn't do anything wrong in the code

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Closes #627

[akinomyoga]

starship conflicts with a theme specified by OSH_THEME since both provide PS1. Shouldn't this be implemented as a theme?

[akinomyoga]

In addition, our themes are supposed to be able to switch to another theme when requested, i.e. a theme can be unloaded and another theme can be loaded. Starship can be enabled by eval "$(starship init bash)", but is there a way to unload Starship in a Bash session where Starship was loaded?

[Heus-Sueh]

starship conflicts with a theme specified by OSH_THEME since both provide PS1. Shouldn't this be implemented as a theme?

I based it on what ohmyzsh did, which is a plugin instead of a conventional theme

but is there a way to unload Starship in a Bash session where Starship was loaded?

Looking at the starship commands, I didn't find a way to turn it off in an active session

maybe I should add this giant warning:

⚠️ ENABLING THIS PLUGIN WILL UNSET YOUR OSH_THEME VARIABLE

?

[akinomyoga]

Although providing an external theme through a "plugin" instead of a "theme" seems wrong, it should probably better for the consistency with the upstream Oh My Zsh.