v4.10.0

Focus: Opt-in footer legal/compliance links, plus subpage toolbar, book tab, and sidebar refinements.

Changes

• ⚖️ Added opt-in Footer Legal Links — configure footer.legalLinks to render a row of legal / compliance links (Privacy, Cookies, License, …) above the footer credit, with plain-string or per-locale labels and automatic new-tab handling for external URLs
• 📐 Moved the mobile subpage toolbar to the top (below the book tabs) with full-height active tabs, replacing the bottom-pinned bar
• 🎨 Emphasized the active book tab and dimmed inactive tabs for a clearer state indicator
• 🦶 Clarified the footer credit as "Powered by Docsector — the documentation platform"
• 🧭 Left-aligned the sidebar brand logo with the navigation icons for a tighter menu header
• 📚 Added a Footer documentation page (English + Portuguese)
• ✅ Validated with 201 passing tests and a successful production build