feat: add breadcrumbs to documentation sub-pages

[ulises-jeremias]

Describe the feature

Add breadcrumbs on docs sub-pages so users can navigate back to Docs home and section parents.

Use Case

I'm always frustrated when deep docs pages have no hierarchy trail.

Proposed Solution

Shared breadcrumb component in docs layout; include Home → Docs → Section → Page.

Other Information

Maintainer-seeded Hacktoberfest issue.

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 (docs/site contribution)