The primary change in this commit is the introduction of consent management.
A few minor improvements have been made:
- move common header to ui/templates/base.gohtml
- add an I18NService to unify localization
- add a handlers.getLocalizer function
- fix translation extraction and merging in Makefile
- add a new AuthMiddleware to centralize client certificate authentication
- move client certificate handling to internal/handlers/security.go
- improver error handling, allow localization of HTTP error messages
