don't return anything from toolkit command

[a-stevan]

i get the following LSP error in my editor, because it's true main does not return a string 🤔

in this PR, i propose to truely return nothing from this main command by printing the help page.

alternative

we could also change the signature to nothing -> string

[fdncred]

I think it's better to change it to nothing -> string since it is true that help should return a string.

[a-stevan]

sure can do 😉

[a-stevan]

mm i think there is an issue with my config, i have written a replacement for help which uses a pager when the help page is too long, and Nushell thinks the help inside toolkit.nu is mine instead of the builtin one...

this is not an issue with the nu_scripts so i'll apply the change anyways

[fdncred]

Thanks