I18n fr/technical

[MaximeNzo]

Added French (fr) localization for the Technical section and i18n infrastructure

Summary

• Add a full French translation of the Technical section (overview, deployment guide, Mojaloop Hub components, releases, core services such as Account Lookup, Quoting, Central Ledger, bulk transfers, fraud-related and SDK/scheme-adapter notes, and the FSPIOP API documentation) under /fr/technical/.
• Configure VuePress with locale-specific navigation, sidebar, and language selector for English (/) and French (/fr/), including a French Technical sidebar that mirrors the English structure with translated titles.
• Add a locale-aware 404 page that shows French copy and links when the path is under /fr/.
• Implement automatic language detection in enhanceApp.js so French-preference browsers are redirected to the /fr/ equivalent of the current page on first visit.
• Update technical diagrams and illustrations (for example architecture SVGs and other assets referenced from French pages) so labels and terminology match the French docs where those assets are localized.
• Fix relative image and asset paths in French technical files to account for the extra directory depth compared to docs/technical/... (for example docs/fr/technical/...).

Test plan

• Verify the language dropdown appears and switching between English/Français works
• Navigate through all French Technical sidebar pages and confirm content renders with images
• Click TOC links on Feature documents and confirm scrolling works correctly
• Visit /fr/technical/ and confirm the French 404 page is shown
• Open the site in a French-language browser and confirm auto-redirect to /fr/
• Confirm English pages remain unaffected

[kayiganwa04]

Great jobs.