Fix 404 on localized library directory page

[Ayush4958]

Summary

The corresponding [locale] dynamic route file was missing for the directory subdirectory, this resulted in a 404 page.
Added the missing src/pages/[locale]/libraries/directory/index.astro localized route.

Closes :- #1517

Screen Recording

Screen.Recording.2026-07-19.010212.mp4

[Ayush4958]

Hi @ksen0 ,
I had solves the issue of switching language doesn't work aside English
This PR is ready for review

[Nwakaego-Ego]

Hi @Ayush4958, thank you for this PR. I tested it locally and can confirm that /es/libraries/directory/, which previously returned a 404, now loads correctly, and all other non-English locales work as expected.

cc @doradocodes @ksen0

[ksen0]

Thanks @Nwakaego-Ego for review and @Ayush4958 for the work! PS If you find other places on the site where the localization page is missing, please feel free to make a new PR adding those, and link to this PR/issue for context.