feat: add breadcrumbs to documentation sub-pages

[ulises-jeremias]

Describe the feature

Breadcrumbs on docs sub-pages.

Use Case

Deep docs pages lack hierarchy trail.

Proposed Solution

Home → Docs → Section → Page in docs layout.

Other Information

Maintainer-seeded Hacktoberfest issue for Create-Vlang-App website.

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

Version used

website @ main

Environment details (OS name and version, etc.)

n/a