Implement hardening checks for user namespaces (#101)

ui: standardize language picker and fix icon deprecations

strings: correct onboarding hint text ("Android" -> "Linux") and remove stray space before "!"

docs: remaster interactive documentation for CLI consistency

Translations update from Hosted Weblate (#104)

fix: remove useless container entry log message in container.c

cgroup: fix stale ds-enter-* dirs not being cleaned up after session exit

boot-module: sepolicy.rule: make termux happy (#106)

fix(about): use plural resource for contributor commit count

documentation.c: restore terminal state on SIGINT/SIGTERM