Add a features section to the landing home (EN/ES) that describes what
Tane does by intent, not mechanism: inventory, care & calendar, labels &
backup, and the neighbourly sharing layer (offers, chat, trust, plantaré,
sync). Follows the existing pillars/values pattern (front-matter data +
template + CSS, RTL-safe). Reframe the beta status copy so the sharing
layer reads as 'arriving, in beta' rather than 'being built'.
Weblate has no native Hugo-TOML format. The strings are already the go-i18n
structure ([key]/other=), so convert site/i18n/{en,es}.toml -> {en,es}.json
({"key":{"other":"..."}}) — Hugo 0.140 reads it identically (verified with the
pinned hugomods/hugo:exts-0.140.2 image). Enables a 'site' Weblate component.
Update TRANSLATIONS.md: site is now a component (go-i18n-json), not deferred.
