Dependency upgrades, breadcrumb removal

### Renderer

- Removed the navigation breadcrumbs, as it is now natively available in Material MkDocs (94f75290, !73)
- Removed the unused renderer v1 and v2 implementations

### Documentation

- Enabled more Material MkDocs features (!72)

### Dependencies

- Kotlin 2.3.0
- Gradle 9.2.1
- Dokka 2.1.0