use the last path token as destination for install

[amtoine]

related to

• make the themes a module nu_scripts#648 (comment)

Description

when trying to make the themes of the nu_scripts a module that can be installed as part of the nu-scripts package in nushell/nu_scripts#648, there is a big issue: all the files in the themes directory are installed, this includes the themes but also a README, script, and 55Mb of screenshots 🤔

in this PR i try to mitigate that issue with a simple change 😋

instead of installing the themes from nu-themes/ with ./nu-themes/ in $.modules in package.nuon

#┬────────name─────────┬type
0│nu-themes/README.md  │file
1│nu-themes/make.nu    │file
2│nu-themes/screenshots│dir
3│nu-themes/themes     │dir
─┴─────────────────────┴────

which will install the screenshots, this PR allows to install only the nu-themes/ directory in a themes/ directory, i.e. swap the names of the two directories

#┬───────name───────┬type
0│themes/README.md  │file
1│themes/make.nu    │file
2│themes/nu-themes  │dir
3│themes/screenshots│dir
─┴──────────────────┴────

and then specifying $.modules as being [./themes/nu-themes] ❗

the only change is that the destination for the package is computed as the last path token from $.modules, here nu-themes 👌

[kubouch]

Thanks, yeah, this makes more sense.